C++ program in a file called pp7a.cpp that declares and initializes an array of MAX_STUDENTS grades like this: double grades[MAX_STUDENTS] = {99.9, 65.7, 87.8, 96.1, 56.8 } ; Use a for loop to print the grades and sum them. Calculate and print the average. Challenge: initialize the grades in a sorted order and calculate the median grade. (You may want to do this challenge after you have completed the remaining chapter 7 pair programming activities.) See tests for more details.