Question: Write a C++ program that reads a list of double-precision grades from the keyboard into an array named grade. The grades are to be counted as they're read. After all grades have been input, your program should find and display the sum, median, mean and standard deviation of the grades. The grades should then be listed with an asterisk (*) placed in front of each grade that's below the average. The program should also display each grade and its letter equivalent, using the following scale: Between 70 and 100 = A. Greater than or equal to 60 and less than 70 = B. Greater than or equal to 50 and less than 60 = C. Greater than or equal to 40 and less than 50 = D. Less than 40 = F.