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