In class we discussed Boolean operators (and, or , and not). One Boolean operator that is not included in C++ is the exclusive or often abbreviated as xor. The output of the a xor b is true if a is true or b is true, but not both. Write a program that does the following: Asks the user to type in t or f for the value of the first variable, designating either true or false. Ask again for the second variable. It then calculates the exclusive or of the two variables and outputs: The exclusive or of those two inputs is _____, where the blank says either true or false, depending on the exclusive or outcome. Note if the person types in anything besides t or f the program should say invalid input please try again and allow the user to make another attempt.