Write a program that uses a sentinel loop to input integers. The loop should end when a 0 (zero) is input. After each input, the program must print whether the sum of all the digits in that number is an even or odd number. In your solution, you should implement two methods (in addition to main): A method called digitSum that takes an integer number as its argument and returns the sum of all its digits. A method called nextIntValidated that prompts for, and inputs, an integer from the user and returns it to the caller. However, if anything other than an integer is typed by the user, the method should inform the user that the number is not valid and input another. The method should only return when it has an integer (which could be the sentinel 0). The argument to this method should be a reference to a Scanner object. Before finishing, the program must also state whether the sum of all the digits of all the numbers is odd or even.