Here's an example C++ program to calculate the sum of two integers:
c++
#include <iostream>
int main() {
int x, y;
std::cout << "Enter two integers:";
std::cin >> x >> y;
int sum = x + y;
std::cout << "The sum of " << x << " and " << y << " is: " << sum << std::endl;
return 0;
}
In this program, we first declare and initialize two integer variables x and y. We then prompt the user to enter two integers, which are read in using the std::cin function.
Next, we calculate the sum of x and y by adding them together and storing the result in a new integer variable sum.
Finally, we print the sum of x and y using the std::cout function. The output message includes the values of x, y, and sum, along with some descriptive text.
When you run this program and enter two integers at the prompt, it will calculate their sum and print the result to the console.
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What programming practices can we learn by studying SML language?
Justify your answer with specific examples.
SML stands for Standard Meta Language. It is a general-purpose, functional programming language that is statically typed. Some programming practices that can be learned by studying SML are: Immutable variables, Pattern matching, Higher-order functions, Recursion.
1. Immutable variables:
SML is a functional programming language that employs immutable variables. Immutable variables make it simple to reason about the correctness of the program's behavior. Since the variables cannot be modified once they have been declared, the program is less error-prone and easier to debug.2. Pattern matching:
Pattern matching is a technique used in SML to destructure data structures such as tuples, lists, and records. It enables pattern matching to be used to define a function. This technique improves readability, flexibility, and code reuse. It can be used to define custom datatypes and, when used correctly, results in less code and increased performance.3. Higher-order functions:
SML is a language that allows functions to be passed as arguments to other functions, returned as results, and assigned to variables. Higher-order functions, such as map, reduce, filter, and folder, are examples of such functions. They are powerful and can be used to make code more concise and reusable.4. Recursion:
SML is a language that is optimized for recursion. It is important to know that all SML functions are recursive by default, which means that they can call themselves. Recursion is essential in functional programming and is used to solve many problems, such as traversing trees and searching for elements in lists. Recursion is also used to solve problems that would otherwise be difficult to solve using an iterative approach.Example of these practices:
Consider the following code:
fun sum [] = 0 | sum (h::t) = h + sum t
The sum function takes a list of integers as input and returns their sum.
This function uses pattern matching to destructure the list into a head (h) and a tail (t). If the list is empty, the function returns 0. If it isn't empty, it adds the head to the sum of the tail (which is computed recursively).
This function is an example of the following programming practices:
Immutable variables, since h and t are both immutable and cannot be modified. Pattern matching, since the list is deconstructed using pattern matching.Recursion, since the function calls itself recursively on the tail of the list.To learn more about programming: https://brainly.com/question/16936315
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Write a program to enter the value of two variables. Find the minimum value for two variables.
The program prompts the user for two variable values, compares them, and outputs the minimum value.
To find the minimum value of two variables, you can write a program that prompts the user to enter the values of the variables, compares them, and then outputs the minimum value.
Here's an example program in Python:
```python
# Prompt the user to enter the values of the variables
var1 = float(input("Enter the value of variable 1: "))
var2 = float(input("Enter the value of variable 2: "))
# Compare the values and find the minimum
minimum = min(var1, var2)
# Output the minimum value
print("The minimum value is:", minimum)
```
The program starts by asking the user to enter the values of two variables, `var1` and `var2`. It then uses the `min()` function in Python to compare the values and determine the minimum value. The minimum value is stored in the `minimum` variable. Finally, the program outputs the minimum value using the `print()` function. By comparing the two variables and finding the minimum value, the program provides the desired result.
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Write a function file in MATLAB that calculates activity coefficients for any number of components. The input variables being composition, molar volumes, temperature, and interaction parameters a. The line that defines the function should look more or less like this: function g = wilson (x, a, V, RT) Test your function files for a system consisting of water, acetone and methanol with molar fractions of 0.25, 0.55 and 0.20 respectively at a temperature of 50 °C.
The function file in MATLAB that calculates activity coefficients for any number of components.
The MATLAB codefunction g = wilson(x, a, V, RT)
N = length(x); % Number of components
ln_gamma = zeros(N, 1); % Initialize activity coefficients
for i = 1:N
sum_term = 0;
for j = 1:N
sum_term = sum_term + x(j) * a(i, j);
end
ln_gamma(i) = -log(x(i) + sum_term);
end
g = exp(ln_gamma);
end
% Test the function for water, acetone, and methanol at 50 °C
x = [0.25; 0.55; 0.20];
a = [0 0.044 0.048; 0.044 0 0.048; 0.048 0.048 0];
V = [18; 58; 32]; % Molar volumes in cm^3/mol
R = 8.314; % Universal gas constant in J/(mol K)
T = 50 + 273.15; % Temperature in Kelvin
RT = R * T;
g = wilson(x, a, V, RT);
disp(g);
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3) Requirements engineering is one important process in software engineering. With aid of a diagram explain this process, showing all the stages involved [10]
Requirements engineering is a systematic process in software engineering that involves gathering, analyzing, documenting, and managing requirements for a software system.
How is this so?The stages of requirements engineering include requirements elicitation, requirements analysis, requirements specification, requirements validation, and requirements management.
These stages are depicted in a diagram where each stage is connected in a sequential manner, representing the flow of activities involved in understanding and defining the needs of stakeholders and translating them into well-defined system requirements.
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Create three source code files: point.h, point.cpp, and main.cpp. Requirements Define a class called Point using the following UML Class Diagram. Point - x: double - y: double Point() Point (double, double) + getX(): double + getY(): double + showPoint(): void Point() Point (double, double) + getX(): double + getY(): double + showPoint(): void The Point class must meet the following requirements: o The getX() member function returns the value stored in x. o The getY() member function returns the value stored in y. o The showPoint () member function displays the point in (x,y) format, for example: (4,3). Write a program to demonstrate the class that meets the following requirements: o The program must create two points. o The program must demonstrate ALL member functions. o The program must calculate the distance between the two points.
By compiling and running the program, you will see the output showing the coordinates of the two points and the calculated distance between them.
Here are the three source code files that meet the given requirements:
#ifndef POINT_H
#define POINT_H
class Point {
private:
double x;
double y;
public:
Point();
Point(double x, double y);
double getX();
double getY();
void showPoint();
};
#endif
point.cpp:
cpp
Copy code
#include "point.h"
#include <iostream>
#include <cmath>
Point::Point() {
x = 0.0;
y = 0.0;
}
Point::Point(double x, double y) {
this->x = x;
this->y = y;
}
double Point::getX() {
return x;
}
double Point::getY() {
return y;
}
void Point::showPoint() {
std::cout << "(" << x << "," << y << ")" << std::endl;
}
main.cpp:
cpp
Copy code
#include "point.h"
#include <iostream>
#include <cmath>
int main() {
Point p1(4.0, 3.0);
Point p2(6.0, 8.0);
std::cout << "Point 1: ";
p1.showPoint();
std::cout << "Point 2: ";
p2.showPoint();
double distance = std::sqrt(std::pow(p2.getX() - p1.getX(), 2) + std::pow(p2.getY() - p1.getY(), 2));
std::cout << "Distance between the points: " << distance << std::endl;
return 0;
}
The code consists of three files: point.h, point.cpp, and main.cpp.
The Point class is defined in point.h and has private member variables x and y, representing the coordinates of a point. The class provides a default constructor and a parameterized constructor to initialize the point's coordinates. It also includes public member functions getX() and getY() to retrieve the x and y coordinates, respectively. The showPoint() function displays the point in (x, y) format.
In point.cpp, the member function implementations of the Point class are provided. The showPoint() function uses std::cout to print the point in the desired format.
The main.cpp file demonstrates the usage of the Point class. Two Point objects, p1 and p2, are created with specific coordinates. The showPoint() function is called on each object to display their values. Additionally, the distance between the two points is calculated using the Euclidean distance formula and displayed.
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compile a short paragraph about Babbage contribution to the
Field of Computer Architecture.
Charles Babbage, an English mathematician and inventor, made significant contributions to the field of computer architecture. Charles Babbage is renowned for his creation of the Analytical Engine, a mechanical computing device that was designed to perform a wide range of general-purpose computations.
Babbage's vision of the Analytical Engine incorporated key principles such as separate storage and processing units, a control unit for instruction execution, and the concept of conditional branching.
Although the Analytical Engine was never fully realized during Babbage's lifetime, his ideas and designs became instrumental in shaping the future development of computers.
Babbage's contributions to computer architecture have had a profound and lasting impact, inspiring generations of scientists and engineers in the pursuit of technological advancement.
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Consider inserting the following new customer into the MongoDB customers collection: cdb.customers.insert_one( {"cno": 7, "name": "C. Li", "street": "E Peltason", "city": "Irvine, CA", "zipcode": 92617, "rating": 400} ) Compare the structure of this JSON object to the existing objects in the collection. Will this insert operation succeed or fail? a. this operation will succeed b. this operation will fail – customers
{"cno": 1, "name": "M. Franklin", "addr":{"street":"S Ellis Ave","city":"Chicago, IL","zipcode":"60637"}} {"cno":2,"name":"M. Seltzer", "addr":{"street":"Mass Ave","city":"Cambridge, MA","zipcode":"02138"},"rating":750} {"cno":3,"name":"C. Freytag", "addr":{"street":"Unter den Linden","city":"Berlin, Germany"},"rating":600} {"cno": 4, "name": "B. Liskov", "addr":{"street":"Mass Ave","city":"Cambridge, MA","zipcode":"02139"},"rating":650} {"cno":5,"name":"A. Jones", "addr":{"street":"Forbes Ave","city":"Pittsburgh, PA","zipcode":"15213"},"rating":750} {"cno":6,"name":"D. DeWitt", "addr":{"street":"Mass Ave","city":"Cambridge, MA","zipcode":"02139"},"rating":775} -- orders {"ordno": 1001, "cno": 2, "bought":"2022-03-15","shipped" : "2022-03-18", "items" : [{"ino":123,"qty":50,"price":100.00}, {"ino": 456,"qty":90,"price":10.00}]} {"ordno": 1002, "cno": 2, "bought":"2022-04-29", "items" : [{"ino":123,"qty":20,"price":110.00}]} {"ordno": 1003,"cno":3,"bought":"2022-01-01", "items" : [{"ino": 789,"qty":120,"price":25.00}, {"ino":420,"qty":1,"price":1500.00}]} {"ordno": 1004, "cno": 4, "bought":"2021-12-30","shipped":"2021-12-31", "items" : [{"ino": 789,"qty":5,"price":30.00}, {"ino":864,"qty":2,"price":75.00}, {"ino":123,"qty":1,"price":120.00}]}
The insert operation will fail because the structure of the new JSON object does not match the structure of the existing objects in the customers collection.
The existing objects in the collection have an "addr" field nested within the "customers" field, while the new object does not have this nested structure.
The existing objects in the collection have the following structure:
Field: "cno" (customer number)
Field: "name" (customer name)
Nested Field: "addr" (address) with sub-fields "street", "city", and "zipcode"
Field: "rating" (customer rating)
On the other hand, the new JSON object being inserted has the following structure:
Field: "cno" (customer number)
Field: "name" (customer name)
Field: "street" (customer street address)
Field: "city" (customer city)
Field: "zipcode" (customer zipcode)
Field: "rating" (customer rating)
Since the structure of the new object does not match the structure of the existing objects in the collection, the insert operation will fail. To successfully insert the new customer, the structure of the JSON object needs to match the existing structure, including the use of nested fields for the address information.
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Write a C program that on the input of a string w consisting of only letters, separates the lowercase and uppercase letters. That is, you have to modify w such that all the lowercase letters are to the left and uppercase letters on the right. The order of the letters need not be retained. The number of comparisons should be at most 2nwherenis the length of string w. Assume that the length of the input string is at most 49. You are not allowed to use any library functions other than strlen and standard input/output. Your program should have only the main()function.
Sample Output
Enter string: dYfJlslTwXKLp
Modified string: dpfwlslTXLKJY
The given C program separates lowercase and uppercase letters in a string. It swaps lowercase letters with preceding uppercase letters, resulting in lowercase letters on the left and uppercase letters on the right.
```c
#include <stdio.h>
#include <string.h>
void separateLetters(char* w) {
int len = strlen(w);
int i, j;
for (i = 0; i < len; i++) {
if (w[i] >= 'a' && w[i] <= 'z') {
for (j = i; j > 0; j--) {
if (w[j - 1] >= 'A' && w[j - 1] <= 'Z') {
char temp = w[j];
w[j] = w[j - 1];
w[j - 1] = temp;
} else {
break;
}
}
}
}
}
int main() {
char w[50];
printf("Enter string: ");
scanf("%s", w);
separateLetters(w);
printf("Modified string: %s\n", w);
return 0;
}
```
Explanation:
The program uses a nested loop to iterate through the string `w`. It checks each character and if it is a lowercase letter, it swaps it with the preceding uppercase letters (if any). This process ensures that all lowercase letters are moved to the left and uppercase letters to the right. Finally, the modified string is printed as the output.
Note: The program assumes that the input string contains only letters and has a maximum length of 49.
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Please write a program in c++ and use arrays. This program should take a user input
Problem: Mark and Jane are very happy after having their first child. Their son loves toys, so Mark wants to buy some. There are a number of different toys lying in front of him, tagged with their prices. Mark has only a certain amount to spend, and he wants to maximize the number of toys he buys with this money. Given a list of toy prices and an amount to spend, determine the maximum number of toys he can buy. Note each toy can be purchased only once.
Output should be identical to this:
Input: Enter the dollar amount Mark can spend: 50
Enter the number of items: 7
Enter the toy prices: 1 12 5 111 200 1000 10
Output: Maximum number of items Mark can buy: 4
Here's a C++ program that uses arrays to solve the problem:#include <iostream> #include <algorithm>. using namespace std; int main() {int maxAmount, numItems;
cout << "Enter the dollar amount Mark can spend: ";cin >> maxAmount;
cout << "Enter the number of items: ";cin >> numItems; int toyPrices[numItems]; cout << "Enter the toy prices: "; for (int i = 0; i < numItems; i++) { cin >> toyPrices[i];} sort(toyPrices, toyPrices + numItems); // Sort the toy prices in ascending order; int totalItems = 0;int totalPrice = 0; for (int i = 0; i < numItems; i++) { if (totalPrice + toyPrices[i] <= maxAmount) { totalItems++; totalPrice += toyPrices[i]; } else { break; // If the next toy price exceeds the remaining budget, stop buying toys }
}cout << "Maximum number of items Mark can buy: " << totalItems << endl return 0; }In this program, the user is prompted to enter the dollar amount Mark can spend (maxAmount) and the number of items (numItems). Then, the user is asked to enter the prices of each toy. The program stores the toy prices in an array toyPrices.
The sort function from the <algorithm> library is used to sort the toy prices in ascending order. The program then iterates through the sorted toy prices and checks if adding the current price to the totalPrice will exceed the maxAmount. If not, it increments totalItems and updates totalPrice. Finally, the program outputs the maximum number of items Mark can buy based on the budget and toy prices.
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in anroid studio java i want 2 jason file with student detalils amd department detalils ,show student details in the first fragment in this fragment we have a button that sends you to the second fragment which has the department detalils and in the seconed fragment there is a button that sends you back to the first fragment
You'll need to create the necessary UI components, parse the JSON files, populate the fragment layouts with data, and handle the navigation between fragments using FragmentTransaction.
To achieve this in Android Studio using Java, you can follow these steps:
Create a new Android project in Android Studio.
Create two JSON files, one for student details and another for department details. You can place these files in the "assets" folder of your Android project.
Design the layout for the first fragment (student details) and the second fragment (department details) using XML layout files.
Create a model class for Student and Department to represent the data from the JSON files. These classes should have fields that match the structure of the JSON data.
In the first fragment, load the student details from the JSON file using a JSON parser (such as Gson or JSONObject). Parse the JSON data into a list of Student objects.
Display the student details in the first fragment's layout by populating the appropriate views with the data from the Student objects.
Add a button to the first fragment's layout and set an onClickListener on it. In the onClickListener, navigate to the second fragment using a FragmentTransaction.
In the second fragment, load the department details from the JSON file using a JSON parser. Parse the JSON data into a list of Department objects.
Display the department details in the second fragment's layout by populating the appropriate views with the data from the Department objects.
Add a button to the second fragment's layout and set an onClickListener on it. In the onClickListener, navigate back to the first fragment using a FragmentTransaction.
Remember to handle any exceptions that may occur during JSON parsing and fragment transactions.
Overall, by following these steps, you'll be able to display student details in the first fragment and department details in the second fragment, with buttons to navigate between the two fragments.
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Match the terms to the corresponding definition below.
1. Visual components that the user sees when running an app
2. Components that wait for events outside the app to occur
3. Component that makes aspects of an app available to other apps
4. Activities with no user interface
A. Activity
B. Regular App
C. Broadcast Receiver
D. Broadcast Sender
E. Content Receiver
F. Content Provider
G. Services
H. Background Service
The terms correspond to different components in app development. Regular apps are visual components seen by users, while broadcast receivers wait for external events. Content providers make app aspects available, and services are activities without a user interface.
In app development, regular apps (B) refer to the visual components that users see when they run an application. These components provide the user interface and interact directly with the user.
Broadcast receivers (C) are components that listen and wait for events to occur outside the app. They can receive and handle system-wide or custom events, such as incoming calls, SMS messages, or changes in network connectivity.
Content providers (F) are components that make specific aspects of an app's data available to other apps. They enable sharing and accessing data from one app to another, such as contacts, media files, or database information.
Services (G) or background services (H) are activities without a user interface. They perform tasks in the background and continue to run even if the user switches to another app or the app is not actively being used. Services are commonly used for long-running operations or tasks that don't require user interaction, like playing music, downloading files, or syncing data in the background.
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In Python Please
6.24 (Functions) LAB: Swapping variables Write a program whose input is two integers and whose output is the two integers swapped. Ex: If the input is 3 8, then the output is 8 3 Your program must define and call the following function. SwapValues returns the two values in swapped order. def SwapValues (userVall, userVal2)
6.24.1: (Functions) LAB: Swapping variables main.py 1 "'' Define your function here. ''' 2 1 name main 3 if 4 TH Type your code here. Your code must call the function. '''|| 0/10 Load default template...
To swap the values of two integers in Python, a program can be written using a function called SwapValues. The program takes two integers as input and returns the swapped values as output.
The SwapValues function is defined and called in the program's main section. When executed, the program prompts the user to enter two integers, passes them to the SwapValues function, and displays the swapped values.
To implement the program, the following steps can be followed:
Define the SwapValues function that takes two parameters, userVal1 and userVal2.
Inside the function, swap the values of userVal1 and userVal2 using a temporary variable.
Return the swapped values.
In the main section of the program, prompt the user to enter two integers.
Call the SwapValues function, passing the user's input as arguments.
Display the swapped values as the output.
Executing this program allows the user to input two integers, and it outputs the values swapped. The SwapValues function ensures that the values are properly swapped.
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Using Nyquest, derive DS0,T1, using OC1, derive OC1 to OC 768
bit rates
Using the Nyquist theorem, we can derive the bit rates for DS0 and T1 based on the OC1 signal. Additionally, by considering the SONET/SDH hierarchy, we can determine the OC-1 to OC-768 bit rates.
DS0 and T1 Bit Rates:
The Nyquist theorem states that the maximum bit rate of a digital signal is twice the bandwidth of the channel. For DS0, which has a bandwidth of 4 kHz, the maximum bit rate would be 2 * 4,000 = 8,000 bps or 8 kbps. T1, which comprises 24 DS0 channels, has a total bit rate of 24 * 8,000 = 192,000 bps or 192 kbps.
OC-1 to OC-768 Bit Rates:
The SONET/SDH hierarchy defines various Optical Carrier (OC) levels with specific bit rates. Each level is a multiple of the basic OC-1 level. The OC-1 bit rate is 51.84 Mbps, and the higher levels are derived by multiplying this base rate.
Here are the bit rates for OC-1 to OC-768:
OC-1: 51.84 Mbps
OC-3: 3 * OC-1 = 155.52 Mbps
OC-12: 4 * OC-3 = 622.08 Mbps
OC-24: 2 * OC-12 = 1.244 Gbps
OC-48: 4 * OC-12 = 2.488 Gbps
OC-192: 4 * OC-48 = 9.953 Gbps
OC-768: 4 * OC-192 = 39.813 Gbps
Using the Nyquist theorem, we can determine the bit rates for DS0 (8 kbps) and T1 (192 kbps). From there, by considering the SONET/SDH hierarchy, we can derive the bit rates for OC-1 to OC-768.
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Please write C++ functions, class and methods to answer the following question.
Write a function named "createWord" that accepts a word (string) and a
definition (string). It will return the pointer of a newly created Word object
holding that information if they are valid: word and definition cannot be empty or
all blanks. When it is invalid, it will return nullptr to indicate that it cannot create
such Word object.
In C++, functions are a set of instructions that perform a specific task and return a value to the caller. A class is a user-defined data type that contains data members (variables) and member functions (methods) that operate on those data members. In object-oriented programming, classes provide encapsulation, inheritance, and polymorphism.
A class named "Word" is created in the program below, with data members word and definition, and a constructor method to initialize these data members. A method named "validateWord" is created to check if the word and definition are valid or not.
The "createWord" function accepts two strings as parameters, word and definition, and returns a pointer to a new "Word" object. The function first calls the "validateWord" method to check if the word and definition are valid. If they are, it creates a new "Word" object using the "new" keyword and initializes its data members using the constructor method. If they are not valid, the function returns nullptr to indicate that it cannot create a "Word" object.
```c++
#include
#include
using namespace std;
class Word {
public:
string word;
string definition;
Word(string w, string d) {
word = w;
definition = d;
}
};
class Dictionary {
public:
Word* createWord(string word, string definition) {
if (validateWord(word, definition)) {
Word* w = new Word(word, definition);
return w;
}
else {
return nullptr;
}
}
bool validateWord(string word, string definition) {
if (word.empty() || definition.empty()) {
return false;
}
for (char c : word) {
if (!isalpha(c)) {
return false;
}
}
for (char c : definition) {
if (!isalnum(c) && c != ' ') {
return false;
}
}
return true;
}
};
int main() {
Dictionary dict;
string word, definition;
cout << "Enter a word: ";
getline(cin, word);
cout << "Enter a definition: ";
getline(cin, definition);
Word* w = dict.createWord(word, definition);
if (w == nullptr) {
cout << "Invalid word or definition." << endl;
}
else {
cout << "Word: " << w->word << endl;
cout << "Definition: " << w->definition << endl;
}
delete w;
return 0;
}
```
The program uses a class named "Word" to hold the word and its definition and a class named "Dictionary" to create new "Word" objects. The "createWord" function creates a new "Word" object if the word and definition are valid and returns a pointer to it. Otherwise, it returns nullptr to indicate that it cannot create a "Word" object.
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Given two integers m & n, we know how to find the decimal representation of m/n to an arbitrary precision. For example, we know that 12345+54321 = 0.227260175622687358480145799966863643894626387584911912520... As it can be noticed, the pattern '9996686' occurs in this decimal expansion. Write a program that aks the user for two positive integers m & n, a pattern of digits as input; and, 1) outputs "Does not exist" if the pattern does not exist in the decimal expansion of m/n 2) outputs the pattern itself along with a digit before and after its first occurrence. Example 1: Input: 12345 54321 9996686 Where: m = 12345, n = 54321, pattern = 9996686 Output: 799966863 Explanation: 9996686 exists in the decimal expansion of 12345/54321 with 7 appearing before it and 3 appearing after it. 12345/54321 = 0.2272601756226873584801457999668636438... Constraints: The pattern will not be longer than 20 digits. The pattern, if exists, should exist within 10000 digits of the decimal expansion. For example: Input Result 12345 54321 91191252001 119125200
Python is a high-level programming language known for its simplicity and readability.
Here is a program written in Python that implements the given requirements:
python
def find_decimal_pattern(m, n, pattern):
decimal_expansion = str(m / n)[2:] # Get the decimal expansion of m/n as a string
if pattern in decimal_expansion:
pattern_index = decimal_expansion.index(pattern) # Find the index of the pattern in the decimal expansion
pattern_length = len(pattern)
if pattern_index > 0:
before_pattern = decimal_expansion[pattern_index - 1] # Get the digit before the pattern
else:
before_pattern = None
if pattern_index + pattern_length < len(decimal_expansion):
after_pattern = decimal_expansion[pattern_index + pattern_length] # Get the digit after the pattern
else:
after_pattern = None
return f"{pattern} exists in the decimal expansion of {m}/{n} with {before_pattern} appearing before it and {after_pattern} appearing after it."
else:
return "Does not exist"
# Example usage
m = int(input("Enter the value of m: "))
n = int(input("Enter the value of n: "))
pattern = input("Enter the pattern of digits: ")
result = find_decimal_pattern(m, n, pattern)
print(result)
Note: The program assumes that the user will input valid positive integers for 'm' and 'n' and a pattern of digits as input. Proper input validation is not implemented in this program.
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Assuming narray is an int array, what type of statement is this? auto [v1, v2, v3] = narray: A. multiple array copy B. structured binding declaration C. automatic array initialization D. alias assignment E. None of these
B. structured binding declaration. The statement auto [v1, v2, v3] = narray is a structured binding declaration.
It allows you to bind multiple elements of an array or tuple to individual variables. In this case, the elements of the narray are being assigned to variables v1, v2, and v3.
The auto keyword is used to deduce the type of the variables v1, v2, and v3 from the type of the elements in the narray. This feature was introduced in C++17 to simplify working with structured data.
Option A (multiple array copy) refers to copying the elements of one array to another, which is not happening in this statement.
Option C (automatic array initialization) refers to initializing an array with values without explicitly specifying the size, which is not the case here.
Option D (alias assignment) refers to creating an alias for a variable using the = assignment operator, which is not happening here.
Therefore, the correct answer is B. structured binding declaration.
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Choose the incorrect statements and explain the reason. Greedy Algorithms 1 make a choice that looks best at the moment il find complex and locally optimal solution iii. easy to program and get the result quickly iv. sometimes lead to global optimal solutions v. can solve the Coin Changing, LCS, and Knapsack problems
The incorrect statement is: Greedy Algorithms can solve the Coin Changing, LCS, and Knapsack problems.
Greedy algorithms are not guaranteed to solve all optimization problems optimally. While they can provide efficient and locally optimal solutions in some cases, they may fail to find the global optimal solution for certain problems. The statement suggests that greedy algorithms can solve the Coin Changing, LCS (Longest Common Subsequence), and Knapsack problems, which is not always true.
Coin Changing problem: Greedy algorithms can provide an optimal solution for certain cases, such as when the available coin denominations form a "greedy" set (i.e., each coin's value is a multiple of the next coin's value). However, for arbitrary coin denominations, a greedy approach may not give the optimal solution.
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What do you understand by "Digital Feudalism"? Describe its implications from the organizational as well as individual perspectives.
Digital feudalism refers to a situation where a small number of powerful technology companies control and dominate the digital realm, creating a hierarchical structure reminiscent of feudal societies.
From an organizational perspective, digital feudalism implies that these companies have immense power over smaller businesses, dictating terms, monopolizing markets, and potentially stifling innovation. They can also influence public discourse and shape the flow of information. From an individual perspective, digital feudalism raises concerns about privacy, data ownership, and limited choices. Users may become dependent on a few platforms for their digital lives, leading to a loss of autonomy and control over personal data.
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How the following techniques are related to the computer performance (i.e. how they improve the computer performance). (6 points) a. branch prediction b. data flow analysis 5. Pipeline technique ... (7 points) a. What are the conditions that cause the pipelines to stall? b. Do you know of any technique that helps reduce the number of pipeline stalls? Explain you answer... 6. Why interrupt-driven 10 technique performs better that the DMA (Direct memory access) 10 technique? (4 points) 7. How is the locality principle related to the cache memory?
Branch prediction: Branch prediction is a technique used in modern processors to improve computer performance by predicting the outcome of conditional branch instructions (e.g., if-else statements, loops) and speculatively executing the predicted branch.
By predicting the correct branch, the processor avoids pipeline stalls caused by waiting for the branch instruction to be resolved, leading to improved performance.
Data flow analysis: Data flow analysis is a technique used to analyze and optimize the flow of data within a program. By analyzing how data is used and propagated through different parts of the program, optimizations can be applied to improve performance. For example, identifying variables that are not used can lead to dead code elimination, reducing unnecessary computations and improving performance.
Pipeline technique: The pipeline technique is used to improve computer performance by breaking down the execution of instructions into multiple stages and executing them concurrently. Each stage of the pipeline performs a specific operation (e.g., fetch, decode, execute, write back), allowing multiple instructions to be processed simultaneously. This overlap of instruction execution improves throughput and overall performance.
a. Conditions that cause pipelines to stall include:
Data hazards: Dependencies between instructions where the result of one instruction is needed by a subsequent instruction.
Control hazards: Branches or jumps that change the program flow and may cause the pipeline to fetch and decode incorrect instructions.
Structural hazards: Resource conflicts when multiple instructions require the same hardware resource.
Memory hazards: Dependencies on memory operations that require accessing data from memory.
b. Techniques to reduce pipeline stalls include:
Forwarding: Forwarding or bypassing allows data to be passed directly from one pipeline stage to another, bypassing the need to write and read from memory.
Speculative execution: Speculative execution involves predicting the outcome of branches and executing instructions speculatively before the branch is resolved.
Branch prediction: Branch prediction techniques aim to predict the outcome of branches accurately to minimize pipeline stalls caused by branch instructions.
Interrupt-driven technique vs. DMA (Direct Memory Access) technique:
Interrupt-driven technique: In this technique, the processor responds to external events or interrupts and switches its execution to handle the interrupt. The processor saves the current state, executes the interrupt handler, and then resumes the interrupted task. This technique is efficient for handling a large number of interrupts or events that require immediate attention.
DMA (Direct Memory Access) technique: DMA is a technique where a dedicated DMA controller takes over the data transfer between devices and memory without the intervention of the processor. The DMA controller manages the transfer independently, freeing up the processor to perform other tasks. DMA is beneficial for high-speed data transfer between devices and memory.
The interrupt-driven technique performs better than the DMA technique in scenarios where there are frequent events or interrupts that require immediate attention and handling by the processor. The interrupt-driven technique allows the processor to respond promptly to interrupts and perform necessary operations based on the specific event or interrupt condition. DMA, on the other hand, is more suitable for large data transfers between devices and memory, where the processor can offload the data transfer task to a dedicated DMA controller, allowing it to focus on other tasks.
Locality principle and cache memory: The locality principle is related to cache memory in the following ways:
The principle of locality states that programs tend to access a relatively small portion of the address space at any given time. There are two types of locality:
Temporal locality: Recently accessed data is likely to be accessed again in the near future.
Spatial locality: Data located near recently accessed data is likely to be accessed soon.
Cache memory exploits the principle of locality to improve computer performance. Cache memory is a small, fast memory that stores recently accessed data and instructions. When the processor needs to access data, it first checks the cache memory. If the data is found in the cache (cache hit), it can be retrieved quickly, avoiding the need to access slower main memory (cache miss). By storing frequently accessed data in the cache, cache memory reduces the average memory access time and improves overall performance. Cache memory takes advantage of both temporal and spatial locality by storing recently accessed data and data that is likely to be accessed together in contiguous memory locations.
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Part 1 Write a class named TestScores. The class constructor should accept an array of test scores as argument. The class should have a public method called averageScoreto return the average of the test scores. If any test score in the array is negative or greater than 100, the class should throw an IllegalArgumentException. Part 2 Demonstrate the TestScores class in a program by creating a TestScoresDemo class in the same package. The program should ask the user to input the number of test scores to be counted, and then ask the user to input each individual test score. It should then make an array of those scores. It should then create a TestScores object, and pass the above array to the constructor of TestScores. It should then call the averageScore() method of the TestScores object to get the average score. It should then print the average of the scores. If the main() method catches an IllegalArgumentException exception, it should print "Test scores must have a value less than 100 and greater than 0." and terminate the program. Sample Run 1 Enter-number-of-test scores:52 Enter-test score 1: 702 Enter test score 2: 652 Enter-test score 3: 94 Enter-test score 4: 550 Enter-test score 5: 90 74.8 Sample Run 2 Enter number of test scores:52 Enter test score.1: 70 Enter-test score 2: 65 Enter test score 3: 1234 Enter-test score 4:55 Enter-test score-5: 90 Test scores must have a value less than 100 and greater than 0.
The program will calculate and display the average score if all the scores are within the valid range. If an invalid score is entered, it will print the error message as specified in the sample run.
Here's the solution for the requested TestScores and TestScoresDemo classes:
// TestScores.java
public class TestScores {
private int[] scores;
public TestScores(int[] scores) {
this.scores = scores;
}
public double averageScore() {
int sum = 0;
for (int score : scores) {
if (score < 0 || score > 100) {
throw new IllegalArgumentException("Test scores must have a value less than 100 and greater than 0.");
}
sum += score;
}
return (double) sum / scores.length;
}
}
java
Copy code
// TestScoresDemo.java
import java.util.Scanner;
public class TestScoresDemo {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the number of test scores: ");
int count = scanner.nextInt();
int[] scores = new int[count];
for (int i = 0; i < count; i++) {
System.out.print("Enter test score " + (i + 1) + ": ");
scores[i] = scanner.nextInt();
}
try {
TestScores testScores = new TestScores(scores);
double average = testScores.averageScore();
System.out.println("Average score: " + average);
} catch (IllegalArgumentException e) {
System.out.println("Test scores must have a value less than 100 and greater than 0.");
}
}
}
In the TestScores class, we accept an array of test scores in the constructor. The averageScore() method calculates the average of the test scores and throws an IllegalArgumentException if any score is negative or greater than 100.
In the TestScoresDemo class, we prompt the user to enter the number of test scores and each individual test score. We create an array of those scores and pass it to the TestScores constructor. We then call the averageScore() method and handle the IllegalArgumentException if it occurs.
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Which aspect of image pre-processing below best categorises the process of identifying objects? a. Image segmentation b. Image restoration d. Image enhancement
The aspect of image pre-processing that best categorizes the process of identifying objects is image segmentation. So, option a is correct.
Image segmentation is the process (pre-processing) of partitioning an image into multiple regions or segments to separate objects from the background. It aims to identify and extract individual objects or regions of interest from an image.
By dividing the image into distinct segments, image segmentation provides a foundation for subsequent object detection, recognition, or analysis tasks.
On the other hand, image restoration and image enhancement are different aspects of image processing that focus on improving the quality or visual appearance of an image.
Image restoration techniques aim to recover the original, undistorted version of an image by reducing noise, removing blur, or correcting other types of degradations that may have occurred during image acquisition or transmission.
Image enhancement techniques, on the other hand, are used to improve specific visual aspects of an image, such as contrast, brightness, sharpness, or color balance, without altering the underlying content or structure.
While both image restoration and image enhancement can contribute to the overall quality of an image, they do not directly involve the process of identifying objects within an image. Image segmentation plays a fundamental role in object identification and extraction, making it the most relevant aspect for this purpose.
So, option a is correct.
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Draw the TCP/IP network architectural model and explain the features of various layers. Also list the important protocols at each layer and describe its purpose. Briefly describe the difference between the OSI and TCP/IP architectural model.
TCP/IP has four layers: Network Interface, Internet, Transport, and Application. OSI has seven layers, but both handle network communication.
The TCP/IP network architectural model consists of four layers: the Network Interface layer, Internet layer, Transport layer, and Application layer. This layer deals with the physical transmission of data over the network. It includes protocols that define how data is transmitted over different types of networks, such as Ethernet or Wi-Fi. Examples of protocols in this layer include Ethernet, Wi-Fi (IEEE 802.11), and Point-to-Point Protocol (PPP).This layer is responsible for addressing and routing data packets across different networks. It uses IP (Internet Protocol) to provide logical addressing and routing capabilities. The main protocol in this layer is the Internet Protocol (IP).
This layer ensures reliable data delivery between two endpoints on a network. It provides services such as segmentation, flow control, and error recovery. The Transmission Control Protocol (TCP) is the primary protocol in this layer, which guarantees reliable and ordered data delivery. Another protocol in this layer is the User Datagram Protocol (UDP), which is used for faster but unreliable data transmission.This layer supports various applications and services that run on top of the network. It includes protocols such as HTTP, SMTP, FTP, DNS, and many others. These protocols enable functions like web browsing, email communication, file transfer, and domain name resolution.
The key difference between the OSI (Open Systems Interconnection) and TCP/IP models is that the OSI model has seven layers, while the TCP/IP model has four layers. The OSI model includes additional layers, such as the Presentation layer (responsible for data formatting and encryption) and the Session layer (manages sessions between applications). The TCP/IP model combines these layers into the Application layer, simplifying the model and aligning it more closely with the actual implementation of the internet protocols.
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6. (P10.3, Page 316) In the DifficHellman protocol, each participant selects a secret number x and sends the other participant a mod q for some public number a. That is, Alice generates her private key as XA = x and her public key as YA = α" mod 9, and sends her public key to Bob. X a) What would happen if the participants instead formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent each other these for some public number a? Propose one method Alice and Bob could use to agree on a key. b) Can Darth break your system without finding the private keys XÃ and XÂ?
The proposed alternative method for forming public keys in the Diffie-Hellman protocol is insecure. To ensure secure key exchange, Alice and Bob should use the Diffie-Hellman key exchange protocol.
Darth cannot break the system without obtaining the private keys or finding vulnerabilities in the cryptographic algorithms used.
a) If the participants formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent them to each other, it would not provide a secure key exchange. An attacker could intercept the public keys and compute the secret key using their own private key, which would compromise the security of the system.
To ensure a secure key exchange, Alice and Bob can use the Diffie-Hellman key exchange protocol. In this protocol, both Alice and Bob agree on a public prime number (q) and a generator (α). They each select a secret number (xA and xB) and compute their respective public keys as YA = (α^xA) mod q and YB = (α^xB) mod q. Then, they exchange their public keys. Finally, they compute the shared secret key as K = (YB^xA) mod q = (YA^xB) mod q.
b) No, Darth cannot break the system without finding the private keys XÃ and XÂ. The security of the system relies on the difficulty of computing the private keys from the exchanged public keys. If Darth does not have the private keys, he cannot compute the shared secret key, which ensures the confidentiality of the communication. However, if Darth manages to obtain the private keys or finds a way to break the cryptographic algorithms used in the protocol, then he could potentially compromise the system's security.
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Predictor (TAP) component of TAPAS framework for Neural Network (NN) architecture search.
1) TAP predicts the accuracy for a NN architecture by only training for a few epochs and then extrapolating the performance.
2) TAP predicts the accuracy for a NN architecture by not training the candidate network at all on the target dataset.
3) It employs a 2-layered CNN with a single output using softmax.
4) TAP is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
The correct answer is option 1.
TAP (Predictor) is a component of the TAPAS framework for Neural Network (NN) architecture search. It predicts the accuracy of a NN architecture by only training for a few epochs and then extrapolating the performance.
A neural network (NN) is a computational method modeled after the human brain's neural structure and function. An NN has several layers of artificial neurons, which are nodes that communicate with one another through synapses, which are modeled after biological neurons. The neural network's training algorithm is a method for modifying the connections between artificial neurons to generate a desired output for a given input. Architecture search is a process of automatically discovering optimal neural network architectures for a given task. To address this problem, a framework for neural architecture search called TAPAS is proposed. It utilizes a two-level optimization strategy to iteratively optimize both the network's architecture and its weights. TAP has three components, i.e., Predictor, Sampler, and Evaluator. TAPAS employs a two-layered CNN with a single output using softmax. It is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
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Give an example of a graph that DFS algorith produces 2
diferrent spanning trees.
A spanning tree of a graph is a sub-graph that includes all vertices of the graph but only some of its edges to ensure that no cycles are present.
The depth-first search algorithm can be used to generate a spanning tree. The graph below is an example of a graph that DFS algorithm generates two different spanning trees. We will use the depth-first search algorithm to generate two spanning trees that differ. Below is the graph in question:
Consider starting the depth-first search at node `1`. We can then obtain the following spanning tree: 1-2-3-4-6-5. Now, suppose we begin the depth-first search from node `5`. We'll get the following spanning tree: 5-6-4-3-2-1. Notice that the two trees are different.
In conclusion, the DFS algorithm can produce two different spanning trees for a graph.
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Consider the following dataset: o vgsales.csv o This dataset contain data of video sales of various publisher, platforms, and genre and it has the following columns Dataset Columns: Column name Description Name The games name Platform Platform of the games release (i.e. PC,PS4, etc.) Year Year of the game's release Genre Genre of the game (ie. Sport, Actions, etc.) Publisher Publisher of the game NA Sales Sales in North America (in millions) EU_Sales Sales in Europe (in millions) JP_Sales Sales in Japan (in millions) Other_Sales Sales in the rest of the world (in millions) Global_Sales Total worldwide sales Instructions: Each team will be required to come with the completed
In the given dataset "vgsales.csv," the columns represent various attributes related to video game sales, including the game's name, platform, year of release, genre, publisher, and sales figures for different regions (North America, Europe, Japan, and the rest of the world), as well as global sales.
Each team is tasked with completing the dataset, presumably by filling in missing values or performing data analysis tasks on the existing data. However, without specific requirements or goals, it is unclear what specific actions are required to consider the dataset completed. Further instructions or objectives would be necessary to provide a more specific solution.
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Consider the following two atomic formulas:
P(z,x,f(y))P(z,x,f(y)) and P(g(x),b,f(g(a)))P(g(x),b,f(g(a)))
where PP is a 3-ary predicate; ff and gg are unary functions; aa and bb are constants; and x,yx,y and zz are variables.
Identify a most general unifier of the two formulas.
Write your answer as a comma-separated list of substitutions; for example: x/y, y/a, z/f(a)
The most general unifier of the two formulas P(z,x,f(y)) and P(g(x),b,f(g(a))) is z/g(a), x/b, and y/g(a). This means that z is unified with g(a), x is unified with b, and y is unified with g(a).
To find the most general unifier, we look for substitutions that make the two formulas identical. Let's examine the two formulas and find a unifying substitution: Formula 1: P(z,x,f(y))
Formula 2: P(g(x),b,f(g(a)))
We can see that z and g(x) should be unified, x and b should be unified, and y and g(a) should be unified. Therefore, we have the following substitutions: z/g(a) (z is unified with g(a))
x/b (x is unified with b)
y/g(a) (y is unified with g(a))
These substitutions make both formulas identical and unify all variables and constants in the two formulas. So, the most general unifier of the two formulas is z/g(a), x/b, and y/g(a), which indicates that z is unified with g(a), x is unified with b, and y is unified with g(a).
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For the below `bank' schema:
customer(customerid,username,fname,lname,street1,street2,city,state,zip)
account(accountid,customerid,description,)
transaction(transactionid,trantimestamp,accountid,amount)
A customer may have several accounts, and each account may participate in many transactions. Each transaction will have at least two records, one deducting amount from an account, and one adding amount to an account (for a single transactionid, the sum of amounts will equal zero).
Using SQL, answer this question (write a SQL query that answers this question):
3. Which transactionids do not sum up to zero (are invalid)?
The SQL query provided retrieves the transaction IDs that do not sum up to zero (are invalid) from the `transaction` table in the `bank` schema.
To answer the question, we need to write a SQL query that identifies the transaction IDs where the sum of the amounts is not equal to zero. Here's the SQL query in a more detailed format:
```sql
SELECT transactionid
FROM transaction
GROUP BY transactionid
HAVING SUM(amount) <> 0;
```
In this query:
- `SELECT transactionid` specifies the column we want to retrieve from the `transaction` table.
- `FROM transaction` indicates the table we are querying.
- `GROUP BY transactionid` groups the transactions based on their ID.
- `HAVING SUM(amount) <> 0` filters the grouped transactions and selects only those where the sum of the amounts is not equal to zero.
By executing this SQL query, the database will return the transaction IDs that do not sum up to zero, indicating invalid transactions.
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Problem 5 Use the fimplicit3 function to create a surface plot of the function X^2 + 30y^2 + 30z^2 = 120
The code for creating a surface plot of the function x²+30y²+30z²=120 is given below in the program, when we execute it we get the surface plot.
To create a surface plot of the equation x²+30y²+30z²=120
we can use the fimplicit3 function in MATLAB.
This function allows us to plot implicit equations in three dimensions.
% Define the equation
eqn = (x, y, z) x² + 30×y² + 30×z² - 120;
% Create the surface plot
fimplicit3(eqn, [-5 5 -5 5 -5 5], 'MeshDensity', 100)
xlabel('X')
ylabel('Y')
zlabel('Z')
title('Surface Plot: X² + 30Y² + 30Z² = 120')
In this code, we define the equation as an anonymous function eqn that takes three variables (x, y, and z).
We then use the fimplicit3 function to plot the equation over the specified range [-5 5] for each variable (x, y, and z).
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Question 1 Find the indicated probability
A card is drawn at random from a standard 52-card deck. Find the probability that the card is an ace or not a club. a. 35/52
b. 10/13
c. 43/52
d. 9/13
Question 2
Solve the problem. Numbers is a game where you bet $1.00 on any three-digit number from 000 to 999. If your number comes up, you get $600.00 Find the expected net winnings -$0.40 -$1.00 -$0.42 -$0.50 Question 3
Use the general multiplication rule to find the indicated probability. You are dealt two cards successively (without replacement) from a shuffled deck of 52 playing cards. Find the probability that both cards are black
a. 25/51
b. 25/102
c. 13/51
d. 1/2652
Question 4 Solve the problem Ten thousand raffle tickets are sold. One first prize of $1400, 3 second prizes of $800 each, and third prizes of $400 each are to be awarded, with all winners selected randomly, if you purchase one ticket, what are your expected winnings? 74 cents 26 cents 102 cents 98 cents Question 5 1 points Save Antwer Use the general multiplication rule to find the indicated probability.
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability that both marbles are white. a. 3/32
b. 3/28
c. 3/8
d. 9/56
The expected net winnings are -$0.40.The probability that the card is an ace or not a club can be found by adding the probability of drawing an ace to the probability of drawing a card that is not a club.
There are four aces in a standard deck, and there are 52 cards in total. So, the probability of drawing an ace is 4/52. There are 13 clubs in a standard deck, so there are 52 - 13 = 39 cards that are not clubs. The probability of drawing a card that is not a club is 39/52. To find the probability of drawing an ace or not a club, we add these two probabilities: P(ace or not a club) = P(ace) + P(not a club) = 4/52 + 39/52
= 43/52. Therefore, the answer is c. 43/52. Question 2: The expected net winnings can be calculated by subtracting the probability of losing from the probability of winning and then multiplying it by the respective amounts. The probability of winning is 1 out of 1000 (since there are 1000 possible three-digit numbers from 000 to 999), so the probability of losing is 999/1000. The amount won is $600, and the amount bet is $1. Expected net winnings = (Probability of winning * Amount won) - (Probability of losing * Amount bet) = (1/1000 * $600) - (999/1000 * $1) = $0.6 - $0.999 = -$0.399. Rounded to two decimal places, the expected net winnings are -$0.40. Therefore, the answer is -$0.40.
Question 3: The general multiplication rule states that the probability of two independent events occurring is the product of their individual probabilities. In this case, the first card being black has a probability of 26/52 (since there are 26 black cards out of 52). After the first card is drawn, there are 51 cards left in the deck, and the number of black cards has decreased by one. So, the probability of drawing a second black card, without replacement, is 25/51. Therefore, the probability of both cards being black is: P(both cards black) = P(first card black) * P(second card black after first card is black) = (26/52) * (25/51) = 25/102. Therefore, the answer is b. 25/102. Question 4: To calculate the expected winnings, we need to find the probability of winning each prize and multiply it by the amount won for each prize. The probability of winning the first prize is 1 out of 10,000, so the probability of winning is 1/10,000. The amount won for the first prize is $1400. The probability of winning a second prize is 3 out of 10,000, so the probability of winning is 3/10,000. The amount won for a second prize is $800. The probability of winning a third prize is 10 out of 10,000, so the probability of winning is 10/10,000. The amount won for a third prize is $400. Expected winnings = (Probability of winning first prize * Amount won for first prize) + (Probability of winning second prize * Amount won for second prize) + (Probability of winning third prize * Amount won for third prize) = (1/10,000 * $1400) + (3/10,000 * $800) + (10/10,000 * $400) = $0.14 + $0.024 + $0.04 = $0.204. Rounded to two decimal places, the expected winnings are $0.20. Therefore, the answer is 20 cents.
Question 5: The probability of drawing two white marbles can be calculated using the general multiplication rule. Initially, there are 8 marbles in the box (3 white, 2 green, 2 red, and 1 blue). The probability of drawing a white marble on the first draw is 3/8 (since there are 3 white marbles out of 8). After the first marble is drawn, there are 7 marbles left in the box, with 2 white marbles remaining. So, the probability of drawing a second white marble, without replacement, is 2/7. Therefore, the probability of drawing two white marbles is: P(both marbles white) = P(first marble white) * P(second marble white after first marble is white) = (3/8) * (2/7) = 6/56 = 3/28. Therefore, the answer is b. 3/28. The response contains 537 words.
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