*6.2 (Sum the digits in an integer) Write a method that computes the sum of the digits in an integer. Use the following method header: public static int sumDigits (1long n) For example, sunDi gits ( 234) returns 9 (= 2 + 3 + 4). (Hint: Use the % opera- tor to extract digits and the operator to remove the extracted digit. For instance, to extract 4 from 234, use 234 % 1 0 (= 4 ). To remove 4 from 234, use 234 / 1 0 23). Use a loop to repeatedly extract and remove the digit until all the digits are extracted. Write a test program that prompts the user to enter an integer then displays the sum of all its digits