Follow the instructions for starting C++ and viewing the Introductory21.cpp file, which is contained in either the Cpp8\Chap12\Introductory21 Project folder or the Cpp8\Chap12 folder. (Depending on your C++ development tool, you may need to open the project/solution file first.) The program should calculate and display the average of the values stored in the rates array. Display the average with two decimal places. Complete the program using the for statement. Save and then run the program.