Using c++ for both please attach working codes with proof. Thank you

01 (Text File Input Output) Write a complete and commented C++ program that reads text from an input file (named "input.txt") and writes to an output file (named "output.txt") the following: 1) Sum. 2) Average. Make sure that your program prompts the user to enter 5 numbers. 02 (find the number of days in a month) Write a program that prompts the user to enter the month and year and displays the number of days in the month. For example, if the user entered month 2 and year 2012, the program should display that February 2012 had 29 days. If the user entered month 3 and year 2015, the program should display that March 2015 had 31 days