In this exercise, you will modify the program from Lab 7-1 in Chapter 7. Follow the instructions for starting C++ and viewing the Intermediate17.cpp file, which is contained in either the Cpp8\Chap08\Intermediate17 Project folder or the Cpp8\Chap08 folder. (Depending on your C++ development tool, you may need to open the project/ solution file first.) Currently, the program displays the average number of text messages sent each day for one week. Modify the program so that it also displays the average number of text messages sent each week for four weeks. Test the program appropriately