Write a program that asks the user to respond to a question by entering either 1 for yes or 2 for no. Use a While loop to continue prompting the user until a valid response is entered. Upon entering a valid response, the program should display an appropriate message to the user. 3-7. King of the Hill. Write a program that reads in a list of positive integers from the user until the user enters the value -1 as a sentinel. At that time the program should display the largest value in the input list.