For this lab you are to use the STL stack which you can obtain by putting #include at the top of your program, and having the std namespace open, of course.Write a program that evaluates an arithmetic expression in postfix (RPN) notation. The basic algorithm is to use a single stack of integers. If, when parsing the input you encounter a number you push the number onto the stack. If you encounter an operator (+, -, *, / are the only ones we are working with) you apply the operator to the top two elements on the stack. The result is then pushed back onto the stack. At the end of the whole operation there should be a single number on the stack which is a single number, the value of the expression.In the files calc_useful.h and calc_useful.cc, I have given you a couple of simple functions, one which identifies if the char it receives is or is not an operator, and the other which evaluates two operands when given a character that is an operator. I have also written a main to help you with parsing the input.The calculator should be embedded in a loop in the main that runs until the user chooses to quit. (Everything that you write for this assignment can be done in the main, just #include "calc_useful.h" and compile both .cc files.)Use your calculator to evaluate:12 679 5 + 4 * 8 / + (Answer = 354)34 6 + 16 * 18 – (Answer = 622)12 6 – 8 + 7 * + (Should produce an error)56 78 84 + 33 * (Should produce an error)Plus: Two problems that you make up on your own. These should each have a minimum of four operands.Run a script of the above interaction including the two problems that you made up on your own.calc_useful.h--------------------double evaluate(double num1, double num2, char op);int evaluate(int num1, int num2, char op);bool isop(char op);calc_useful.cc------------------------bool isop(char op){return op =='+' || op == '-' || op == '*' || op == '/';}int evaluate(int num1, int num2, char op){if(op == '+') return num1 + num2;if(op == '-') return num1-num2;if(op == '*') return num1*num2;if(op == '/') return num1/num2;else return 0;}double evaluate(double num1, double num2, char op){if(op == '+') return num1 + num2;if(op == '-') return num1-num2;if(op == '*') return num1*num2;if(op == '/') return num1/num2;else return 0;}stackmain.cc----------------------------------------#include #include #include "calc_useful.h"using namespace std; int main(){// declare your stack herechar c;int onenum, twonum;cout<<"Please enter your expression:\n";c = cin.get(); // priming read for the sentinel loop.while(c != '\n'){if(isdigit(c)){cin.putback(c);cin>>onenum;// stack operation here.}else if(isop(c)){// if the stack is empty here you have an error.// here is where you have to pop a couple of numbers,// apply the operator to the numbers// and then push the result back into the stack }c = cin.get(); // reading at the bottom of the sentinel loop}// this is where you get your final answer off the stack// it should be the only number left on the stack at this pointif(! nums.empty()){cout<<"Error. Insufficient operators for operands.\n";return -1;}cout<<"The answer is: "<< onenum<

Thus, there are several ways to organize the data to find the first 10 movies shown in San Francisco in 2001, depending on the tools and techniques available to the data analyst.

The data analyst can organize the data in several ways to find the first 10 movies shown in San Francisco in 2001.

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The graphics used in "go!," a handheld video game featuring racecars, are protected by intellectual property laws. Specifically, the graphics may be protected by copyright law if they meet the criteria for originality and fixation.

Copyright law grants the creator of an original work, including graphics, the exclusive right to reproduce, distribute, and display the work. The creator can also license these rights to others for a fee or other consideration.

Additionally, the graphics may be protected by trademark law if they are used to identify the source of the video game or any related products or services. A trademark owner has the exclusive right to use the trademark in commerce and can prevent others from using a confusingly similar mark that could dilute the trademark owner's brand.

Finally, the graphics may be protected by design patent law if they meet the criteria for nonobviousness, novelty, and ornamental design. A design patent grants the owner the exclusive right to prevent others from making, using, or selling an article of manufacture that incorporates the patented design.

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The specific fix needed for this code snippet depends on the intended functionality and requirements. Thus, these are some possible fixes that could be applied in different scenarios.

1. If the code is working as intended and there are no specific requirements for changes, then there is nothing wrong with the code snippet. In this case, no fixes are needed.

2. If the title is meant to be displayed in the browser tab, then it should be put under the  tag instead of the <h1> tag. This is because the <title> tag is specifically meant to define the title of the HTML document, which is what is displayed in the browser tab. So, in this case, the fix would be to replace the <h1> tag with a <title> tag and place the title text between the opening and closing tags, like this: <title>My Web Page.

3. If the "My Web Page" text in line 7 is meant to be a string literal, then it should be surrounded by quotes. This is because in HTML, text values are typically enclosed in quotes to indicate that they are string literals. So, in this case, the fix would be to add quotes around the text in line 7, like this:

Welcome to "My Web Page"

4. If line 7 is meant to be a part of the tag, then it should be moved up to line 5. This is because the opening tag of an HTML element should always come before any text or attributes associated with the element. So, in this case, the fix would be to move the text from line 7 up to line 5, like this:

Overall, the specific fix needed for this code snippet depends on the intended functionality and requirements. However, these are some possible fixes that could be applied in different scenarios.

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According to the given cases, the correct option is :

D: I and II only

To understand if the given method "issorted" returns true for an array of integers sorted in non-decreasing order and false otherwise, let's discuss each case:

I. If the array is sorted in non-decreasing order, issorted should return true. This means that each element in the array is less than or equal to the next element. For example, if the array is [1, 2, 3, 3, 4], issorted should return true because it's sorted in nondecreasing order.

II. If the array is not sorted in non-decreasing order, issorted should return false. This means that there is at least one element in the array that is greater than the next element. For example, if the array is [1, 2, 4, 3, 5], issorted should return false because 4 is greater than 3, so the array is not in nondecreasing order.

III. If the array is sorted in decreasing order, issorted should return false. This means that each element in the array is greater than the next element. For example, if the array is [5, 4, 3, 2, 1], issorted should return false because it's sorted in decreasing order.

Considering these cases, the correct answer is option D: I and II only, as these are the conditions when issorted returns true (for non-decreasing order) and false (for not non-decreasing order) respectively.

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To solve the TSP based on the A* algorithm, we need to define a heuristic function that estimates the cost of completing a tour, given that a partial tour has already been constructed.

One possible heuristic function is the following:h(S) = the MST cost of the set of unvisited cities that are reachable from the last city in the partial tour S.Then, we can use the A* algorithm to search for the shortest tour, starting from the initial city and expanding the partial tours by adding one city at a time, until all cities have been visited.

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The service that consists of two types of channels: bearer (b) channels and delta (d) channels is called ISDN (Integrated Services Digital Network).

ISDN is a digital communication network that allows for voice, data, video, and other services to be transmitted simultaneously over the same line. Bearer channels are used for carrying the user's information, while delta channels are used for signaling and control purposes.

Bearer channels can transmit data at a speed of 64 kbps (kilobits per second) and can be combined to provide higher bandwidths. The number of bearer channels that can be used together depends on the type of ISDN service being used. For example, Basic Rate Interface (BRI) service provides two bearer channels (2B) while Primary Rate Interface (PRI) service provides 23 bearer channels (23B).

Delta channels, on the other hand, are used for signaling and control purposes. Delta channels carry information about call setup, call teardown, and other control information related to the ISDN network. Delta channels are used to establish a connection between two devices, to transfer data about the call, and to manage the call during its duration.

Overall, the combination of bearer and delta channels in ISDN allows for efficient and effective communication of various types of data over a digital network.

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A private branch exchange (PBX) handles all in-house calls and places calls onto outside telephone lines.A PBX is a telephone system within an organization that handles incoming and outgoing calls. It serves as the central hub for managing all in-house calls and connecting them to the outside telephone network.

PBX systems are commonly used in large organizations with many employees and multiple phone lines. They allow for efficient call routing and can provide additional features such as voicemail, call waiting, call forwarding, and more.PBX systems provide many features that are designed to improve the efficiency of communication within an organization. These features include:

Call routing: PBX systems can be configured to route calls to specific extensions, groups of extensions, or even to an outside line.

Voicemail: PBX systems can provide voicemail services for individual extensions or groups of extensions.

Call forwarding: PBX systems can be configured to forward calls to another extension or an outside line.

Conference calling: PBX systems can be used to set up conference calls between multiple parties.

Caller ID: PBX systems can display the phone number or name of the person calling.

PBX systems can be physical hardware that is located on-premises or they can be cloud-based and hosted offsite. In recent years, cloud-based PBX systems have become increasingly popular due to their lower cost and increased flexibility.

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When we have labels within our code, for instance in the .data or .text segments, they need to be stored in the Symbol Table.

The Symbol Table is a data structure used by compilers, assemblers, and linkers to keep track of various symbols such as variable names, function names, and labels used within the source code. These symbols represent specific memory locations or addresses within the compiled program.

As a programmer, you can define labels to give meaningful names to specific locations within your code. When the assembler processes the source code, it replaces these labels with their corresponding memory addresses, allowing for easier debugging and better code readability.

In summary, the Symbol Table plays a crucial role in managing symbols and their corresponding addresses within the code, ensuring that labels in .data or .text segments are properly stored and resolved during the compilation and linking process.

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Method overloading is the concept in object-oriented programming where a class can have two or more methods with the same name but different parameter types. Yes, it is permissible to define two methods with the same name but different parameter types, as this is the core idea behind method overloading.

Method overloading is a feature in object-oriented programming that allows a class to have multiple methods with the same name but different parameters.

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Out of the given options, the hypervisor that would work in this scenario is VirtualBox.

This is because VirtualBox can run on a host that lacks hardware virtualization, allowing you to install and run Linux as a guest OS on a Windows 7 machine without the need for virtualization support from the underlying hardware. Windows Virtual PC and Client Hyper-V both require hardware virtualization support to run, and Boot Camp is not a hypervisor, but rather a utility that allows you to install and run Windows on a Mac machine. Therefore, VirtualBox is the best option for this scenario.

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Here's a Python program that allows the user to input their grades for multiple assignments

def average_grade(grades):

   """

   Calculates the mean score of grades found within a list.

   """

   total = 0

   for grade in grades:

       total += grade

   average = total / len(grades)

   return average

my_grades = []

quantity_of_grades = int(input("What number of scores do you need to enter ? "))

for i in range(quantity_of_grades):

   while True:

       try:

           individual_grade = float(input(f"Insert Grade {i + 1}: "))

           if individual_grade < 0 or individual_grade > 100:

               raise ValueError("Unallowable grade. Grades must range from 0 to 100.")

           break

       except ValueError as e:

           print(e)

   my_grades.append(individual_grade)

meanvalue = average_grade(my_grades)

print(f"Your average score is {meanvalue:.2f}")

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Printer troubleshooting system.

A printer diagnostic system is a software tool designed to help users diagnose and troubleshoot common printer problems. The system identifies the cause of the problem and provides recommended solutions to resolve the issue.

This may include checking for printer driver updates, ensuring that the printer is properly connected, and addressing any software conflicts. The printer diagnostic system can save users time and money by helping them resolve printer issues quickly without the need for professional assistance.

It is important to note that while a printer diagnostic system can be helpful, it may not be able to resolve all printer problems and may need to be used in conjunction with additional troubleshooting steps.

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The type of attack carried out by threat actors against a network to determine which IP addresses, protocols, and ports are allowed by ACLs is called a Reconnaissance Attack.

A reconnaissance attack involves the collection of information about a target network without necessarily compromising it. Threat actors use various tools and techniques to scan the network for open ports, IP addresses, and protocols allowed by ACLs. They gather this information to identify vulnerabilities and plan their subsequent attacks. This type of attack is considered the first step in the cyber attack lifecycle, as it helps attackers to create a detailed map of the target network for a successful intrusion.

In summary, a reconnaissance attack is the method employed by threat actors to gather crucial information about a network's IP addresses, protocols, and ports allowed by ACLs, enabling them to identify potential vulnerabilities and plan their attacks effectively.

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The tool that would best help identify the path between the two systems is c)tracert.

Tracert (short for trace route) is a network diagnostic tool that traces the route taken by data packets from one network node to another. It identifies the path that network traffic takes between two systems and lists all the routers, switches, and other network devices that the packets pass through.

This tool helps network administrators to identify connectivity issues, packet loss, and latency problems. The other tools mentioned, such as ipconfig, netstat, and nbtstat, provide information on the local system's network configuration, active connections, and name resolution services.

However, they do not provide information on the path taken by the network traffic between two systems.So correct answer is c.

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The Data rate (Mbps) = 114.29 Mbps

To find the maximum achievable data rate, we solve:

Total clock cycles for a single data transfer = Clock cycles for each data transfer + Clock cycles to acquire and release data buses

Total clock cycles = 4 + 3 = 7

Now, divide the clock frequency by the total clock cycles and multiply by the number of bits per data item:

Data rate (Mbps) = (Clock frequency / Total clock cycles) * Number of bits per data item

Data rate (Mbps) = (100 MHz / 7) * 8 bits

Data rate (Mbps) = 114.29 Mbps

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The given function has been successfully converted into a template function. This new function can be used with any data type for swapping the values of two variables if the first variable is greater than the second one.

cpp
template
void change(T &num1, T &num2) {
   if (num1 > num2) {
       T hold = num1;
       num1 = num2;
       num2 = hold;
   }
}


1. We added the template declaration `template` before the function definition. This tells the compiler that this function is a template function that can work with any data type represented by `T`.
2. We replaced `int` with `T` for both the function parameters and the `hold` variable. This allows the function to accept different data types and perform the swap operation.

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Microsoft Edge allows users who want to annotate Web pages to detail ans insert typed notes and draw on the page with only a fingertip.

Microsoft Edge allows users to perform when annotating web pages.

The correct options are:
A. Insert typed notes
C. Draw on the page with only a fingertip

Microsoft Edge lets users add typed notes and draw on the page using their fingertip or a stylus. However, copying a screen image is not an annotation feature within Microsoft Edge.

                                Microsoft Edge allows users who want to annotate Web pages to detail ans insert typed notes and draw on the page with only a fingertip.

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You should use optical zoom if the camera is too far from the subject.

The optical zoom allows you to zoom in on the subject without losing any image quality. This is because the optical zoom uses the lens to adjust the focal length, which essentially brings the subject closer to the camera. The result is a clear and crisp image that captures the details of the subject even from a distance.

In contrast, the digital zoom simply enlarges the image, which can result in a loss of quality and pixelation. Digital zoom takes the existing image and crops it to create the illusion of a closer view. However, this can result in a lower resolution and grainy image.

Therefore, if you want to capture an image of a subject that is far away, it is recommended to use optical zoom. This will allow you to capture a high-quality image even from a distance. Additionally, it is important to remember that the maximum optical zoom will vary depending on the camera model. Therefore, you should check the camera's specifications to determine the maximum optical zoom before purchasing.

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The total product is the overall amount generated using a given set of resources, the average product is the average cost per unit produced using that same set of resources, and the marginal product is the price for the very next unit produced using those same resources.

#include <stdio.h>

#include <float.h>

int main() {

//Declaring variables for machine names.

char machine_a[4];

char machine_b[4];

char machine_c[4];

char extra_var; //scanf() creates error while consecutive inputs, to reduce this error we use this variable for input.

//Getting names of machines from user input.

printf("Enter the code for first machine.\n");

fgets(machine_a , 4, stdin);

extra_var = getchar();

printf("Enter the code for second machine\n");

fgets(machine_b , 4, stdin);

extra_var = getchar();

printf("Enter the code for third machine.\n");

fgets(machine_c , 4, stdin);

extra_var = getchar();

//Declaring variables to calculate production of machines.

float a = 0.0, b = 0.0, c = 0.0;

//Variable for production input.

float x;

//Total production variable.

float total_production;

//Variables for calculating maximum and minimum production.

float max_production = -1;

float min_production = FLT_MAX;

//Variables for machine names with max and min production.

char max_machine[4];

char min_machine[4];

printf("Enter the 2 productions of machine %s:\n", machine_a);

scanf("%f", &x);

a = a + x;

scanf("%f", &x);

a = a + x; //Calculating total production of machine.

if(a > max_production) {

max_production = a; //finding max production machine.

strcpy(max_machine , machine_a);

}

if(a < min_production) {

min_production = a; //finding min production machine.

strcpy(min_machine , machine_a);

}

printf("Enter the 2 productions of machine %s:\n", machine_b);

scanf("%f", &x);

b = b + x;

scanf("%f", &x);

b = b + x;

if(b > max_production) {

max_production = b;

strcpy(max_machine , machine_b);

}

if(b < min_production) {

min_production = b;

strcpy(min_machine , machine_b);

}

printf("Enter the 2 productions of machine %s:\n", machine_c);

scanf("%f", &x);

c = c + x;

scanf("%f", &x);

c = c + x;

if(c > max_production) {

max_production = c;

strcpy(max_machine , machine_c);

}

if(c < min_production) {

min_production = c;

strcpy(min_machine , machine_c);

}

total_production = a + b + c;

//Calculating Avg Production.

float avg_production = total_production / 3;

printf("Total Production: %0.1f\n", total_production);

printf("Average Production: %0.1f\n", avg_production);

printf("Machine with maximum production: %s\n", max_machine);

printf("Machine with minimum production: %s\n", min_machine);

return 0;}

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The correct answer is b. using a variety of calls involving assert() is a good way to test the method.

While a good programmer should strive to test as many possible input values as feasible, testing all possible input values may not be practical or efficient. Three test vectors may be sufficient, but it ultimately depends on the complexity of the method and the potential for errors. Including negative values as parameters is important for testing boundary cases, but it is not necessary for every test case. Using assert() statements can help verify that the method is returning the expected output for a variety of input values.

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Shelly should focus on the "%MEM" column in the top display.

The "%MEM" column in the top display shows the percentage of the system's total physical memory used by a specific application. This column will help Shelly identify if an application is consuming too much memory and potentially has a problem.

1. Open a terminal on the Linux system.
2. Type the command "top" and press Enter.
3. Locate the "%MEM" column in the displayed information.
4. Observe the values in the "%MEM" column to identify which application is consuming a high amount of memory.

By focusing on the "%MEM" column in the top display, Shelly can identify the application that may be taking up too much physical memory and potentially has a problem.

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The most important aspect of organizing the papers within the folder is to ensure that it is easy to navigate and find the needed documents quickly and efficiently.

In a hierarchical system, folders also referred to as directories and are utilized to gather together relevant files and subfolders.

To help organize their data and make them easier to find, users can create, rename, move, copy, and delete folders. Additionally, users can utilize them to govern access control and rights, limiting or granting access to particular files or folders.

Papers can be ordered alphabetically by title, author, or another identifying characteristic, or chronologically, with the most recent item at the front. In order to give a fast summary of the contents and make it easier to find individual documents, it may also be useful to put a table of contents or index at the start of the folder.

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An "IndexError" will be raised if you try to use an index that is out of range for a list.

If you try to use an index that is out of range for a list in Python, you will get an "IndexError" error.

This error occurs when you try to access an element in a list that does not exist, meaning the index is out of range for the list.

For example, if you have a list with five elements and you try to access the sixth element with an index of five, you will get an "IndexError".

To avoid this error, you can use the "len" function to determine the length of the list, and check if the index is within the range of valid indices.

You can also use try-except blocks to catch and handle "IndexError" exceptions in your code.

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Answer:

This is a true statement.

The command that will print a list of the commands that you've previously executed is the history command.

This command allows you to view a list of all the commands that you have previously entered in the terminal, which can be useful for recalling complex or lengthy commands or for troubleshooting errors that you may have encountered in the past.

The history command can be accessed by typing "history" into the terminal, and it will display a numbered list of all the commands that have been entered since the terminal session was started. You can use the arrow keys to scroll through the list, and you can also use the "!" command followed by the number of a specific command in the history list to re-execute that command.

The history command also supports a number of options that can be used to filter and format the output, such as "-c" to clear the history list, "-a" to append new commands to the history list immediately, and "-n" to suppress the display of line numbers in the output.

Overall, the history command is a useful tool for managing your terminal history and for quickly recalling and re-executing previous commands.

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Relative referencing is a term in Microsoft Excel. A cell reference is a relative reference by default, which implies that the reference is related to the cell's position.

If you refer to cell A2 from cell C2, for example, you are actually referring to a cell two columns to the left (C minus A)—in the same row (2).

Using the $ symbol before the row and column coordinates creates an absolute cell reference that will not change. The reference is relative and will change without the $ symbol. If you are creating a formula for a single cell, you can use any reference type and still get the formula correct.

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Answer: str Buf. delete(1, 4)

Explanation:

To transform the StringBuilder `strbuf` from "abccefc" to "abtteft", you would need to use the `replace()` method. Here's how:After invoking `strbuf.replace(2, 6, "btteft")`, the `strbuf` will contain "abtteft".

StringBuilder is a class in Java that provides a way to efficiently build and manipulate strings. It is similar to the StringBuffer class, but with some differences in implementation and performance characteristics.A StringBuilder object represents a mutable sequence of characters. It has a variety of methods for adding, inserting, and deleting characters and substrings, as well as for converting the contents to a String object. One of the advantages of using a StringBuilder is that it avoids the overhead of creating a new String object every time a modification is made.In the example you gave, the code modifies the characters at specific positions in the string using the setCharAt() method. This method takes two arguments: the index of the character to be changed and the new character to replace it with. By calling this method multiple times, the code effectively replaces some of the characters in the original string with new ones, resulting in the updated string "abtteft".

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Almost all LANs are based on one of two basic forms of supporting technology: Wi-Fi or Ethernet.

A LAN (Local Area Network) is a computer network that connects devices within a limited geographic area, such as a home, office building, or campus. LANs can use a variety of technologies to facilitate communication and data sharing between devices, but the two most common forms of supporting technology are Wi-Fi and Ethernet. Wi-Fi is a wireless networking technology that uses radio waves to transmit data between devices, while Ethernet is a wired networking technology that uses cables to transmit data. Both Wi-Fi and Ethernet have their advantages and disadvantages, and the choice of which technology to use depends on factors such as network size, speed requirements, and security considerations. In recent years, Wi-Fi has become increasingly popular due to its convenience and flexibility, but Ethernet remains an important technology for many applications, especially those requiring high-speed and reliable connections.

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Each task in a systems development project should culminate in one or more deliverables. These deliverables can be thought of as tangible outcomes that result from completing a task or set of tasks.

They can take many different forms, depending on the specific task and the stage of the project, but they all serve the same purpose: to demonstrate progress, communicate status, and provide a basis for the next set of tasks.

In the early stages of a systems development project, deliverables might include requirements documents, feasibility studies, and conceptual designs. These provide a clear picture of what the project is intended to achieve, and help to ensure that everyone involved is on the same page. As the project progresses, deliverables might shift to include more detailed designs, code reviews, and test plans. These provide a way to ensure that the project is progressing as planned, and to identify any issues or risks that need to be addressed.

Ultimately, the success of a systems development project depends on the quality of its deliverables. They provide a tangible measure of progress, and help to ensure that everyone involved is working towards the same goals. By carefully defining the deliverables for each task, and ensuring that they are completed to a high standard, project managers can help to ensure that their systems development projects are successful.

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If you want all of the text in a web page to be the same, a(n) global stylesheet is appropriate.

A global stylesheet, also known as a universal or default stylesheet, is a stylesheet that applies to an entire web page and affects all elements on the page. This means that all text, headings, links, and other elements will have the same style and formatting, unless overridden by more specific styles.

                          Global stylesheets are useful for creating a consistent look and feel across a website, and for simplifying the process of making global changes to the design.
                                             To have all of the text in a web page to be the same, an "external" stylesheet is appropriate. An external stylesheet is a separate file containing CSS rules, which is linked to the HTML document. This allows you to apply consistent styling across the entire website by linking the same stylesheet to multiple pages.

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Final answer:

The option used to make the text appear thicker and darker is the 'font-weight' property in CSS.

Explanation:

In web design, the 'font-weight' property in CSS is used to make text appear thicker and darker. This property allows you to specify the thickness or boldness of the text. The values for 'font-weight' range from 100 (thin) to 900 (thick), with 400 being the default normal weight and 700 being the default bold weight.

To make the text appear thicker and darker, you can set the 'font-weight' property to a higher value. For example, setting it to 700 will make the text bold, while setting it to 900 will make it even thicker and darker.

Learn more about styling text in web design here:

https://brainly.com/question/31757393

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