Problem 5) Develop a program that asks the user to enter a number. If the user enters 1, the program computes and displays the value of S1. If the user enters 2, the program computes and displays the value of S2. If the user enters something else, the program displays the message: “invalid choice”. The following equations define S1 and S2: S1 = ∑(k=1 to N) k S2 = ∑(r=1 to N) r + 5r The user provides the value of N. Problem 6) Develop a C++ program that continuously prompts the user to enter a po