17. (10 points) Method implementation. We want to store the contents in decreasing (1.e.. non-increasing (-decreasing or equal) order. Implement locateIndex ToAdd(Object)" and "locateIndexToRemove(Object)" using "getHead()" defined below and also shown in the UML diagram on page 2 RESTRICTION You are ask not to use "size()" numitems, and count-related methods or variables to get the points, but use "getHead to access the first node in SLL List Reference Based public Node getHeado { return head: } // Use get Head() to implement the two methods below. (5 points) Sortedl.ist ReferenceBased public int locatelndexToAdd(Object item) { } (5 points) Sorted List ReferenceBased public int locateIndexToRemove(Object item) {