Write a C$++$ program that will implement the following tasks to help students understand the difference between local and global identifiers. Make sure to use appropriate variable types and display the results clearly.

Global Identifiers:

a$)$ Declare a global integer variable outside of any function.

b$)$ Assign a suitable value to the global variable.

c$)$ Write a function that accesses and prints the value of the global variable.

d$)$ Call the function from the main function to display the value of the global variable.

Local Identifiers:

a$)$ Write a function that declares a local integer variable.

b$)$ Assign a suitable value to the local variable.

c$)$ Print the value of the local variable within the function.

d$)$ Call the function from the main function.

Scope of Identifiers:

a$)$ Declare a local integer variable with the same name as the global variable.

b$)$ Assign a different value to the local variable.

c$)$ Print the values of both the local and global variables within the function.

d$)$ Discuss the concept of scope and explain why the local variable shadows the global variable.

Global Keyword:

a$)$ Declare a local integer variable with the same name as the global variable.

b$)$ Use the global keyword to access the value of the global variable within the function.

c$)$ Print the values of both the local and global variables within the function.

d$)$ Explain the purpose of the global keyword and how it allows accessing global variables from within a local scope.

Static Local Variables:

a$)$ Write a function that uses a static local integer variable.

b$)$ Initialize the static variable with an initial value.

c$)$ Modify and print the static variable within the function.

d$)$ Call the function multiple times from the main function and observe the behavior of the static variable.

Constant Variables:

a$)$ Declare a global constant integer variable.

b$)$ Assign a suitable value to the constant variable.

c$)$ Write a function that attempts to modify the constant variable.

d$)$ Discuss the concept of constant variables and explain why modifying a constant variable results in a compilation error.

Note: You are encouraged to use appropriate variable names, comments, and proper indentation in your code for better readability.