split(self) (3 points) Divides the original list in half, returning two new instances of SortedLinkedList, one with the first half, and another one with the second half. If the number of nodes is odd, the extra node should go in the first half. It does not mutate the original list. Method returns None if the original list is empty. Preconditions Returns: None if the original list is empty SortedLinkedList, SortedLinkedList two linked list objects