write a python function that detemine whether or not a list of values is in sorted order (either ascending or descending) the function should return true if the list is already sorted otherwise it should return False. List1 = [2,5, 7, 19, 5] List2 = [3, 8, 9, 20] List3 = [20, 12, 9, 7] List4 = [19, 15, 13, 17]