Exercise 3 The Factorial of a positive integer N is defined as: N! = N*(N-1)*(N-2)*...*1 for N > 0 1 N==0 For example for N=5, N!= 5*4*3*2*1 =120 Write a C++ program that asks the user to enter a positive integer N. The program then computes and prints the factorial of N (i.e., N!) using a while loop. Code: Screenshot: Exercise 4 Write a program that asks the user to enter integer one by one, until the user enters a 0. When the user enters a 0, the program should print the number and sum of all the numbers the user has entered, including the 0. Use a do-while loop. Code