20. You must assign the grades for a programming class. Right now the class is studying recursion, and students have been given this simple assignment: Write a recursive method sumSquares that takes a reference to a linked list of Inte ger elements and returns the sum of the squares of the elements. The list nodes are of class LLNode. The objects in the list are all of class Integer. Example: ist5 sumSquares (11st) yields (5 . 5) + (2 2) + (3 3) + (11) = 39 Assume that the list is not empty. You have received quite a variety of solutions. Grade the methods below, marking errors where you see them. a. int sumSquares (LLNodeKInteger> 1ist) return 0 if (list !- nul1) return (list.getInfo) list.getInfo) + sumSquares(list.getLink ())): b. int sumsSquares (LLNode list) int sum = 0