Python - A list is sorted in ascending order if it is empty or each item except the last one is less than or equal to its successor. Define a predicate isSorted that expects a list as an argument and returns True if the list is sorted, or returns False otherwise. (Hint: for a list of length 2 or greater, loop through the list and compare pairs of items, from left to right, and returns False if the first item in a pair is greater.)