1. Program alt harmonic.cpp: a. Prompt and read the value of n from the user. This value must be21. Use a while loop to repeatedly prompt and re-read this value from the user if a value entered is invalid. b. Use for loop(s) to compute the alternating series (see above) CSE1222 Lab 6 CSE1222-Spring 2018 c. Print the resulting sum. Debug your code by trying your program with larger values of n. If your sums approach the value of In (2) on your calculator then your program is probably correct. d