Consider the following program segment:
//include statement(s)
//using namespace statement
int main()
//variable declaration
//executable statements
//return statement
a. Write a C++ statement that includes the header file iostream.
b. Write a C++ statement that allows you to use cin, cout, and endl without the prefix std::.
c. Write C++ statement(s) that declare the following variables: num1, num2, num3, and average of type int.
d. Write C++ statements that store 125 into num1, 28 into num2, and -25 into num3.
e. Write a C++ statement that stores the average of num1, num2, and num3 into average.
f. Write C++ statement(s) that output the values of num1, num2, num3, and average.
g. Compile and run your program.