6. Answer the following questions using the singly linked list shown below. tail head 10304050 a) (2 Pts) Provide the content of the node referenced by head after the following statement is executed. head = head.next.next b) (2 Pts) Provide the content of the node referenced by tail after the following statements are executed. tail head.next.next tail.next-null; 7. (2 Pts) A doubly linked list stores the elements, 20, 11, 18, 19 12. Assume that ptr points to the node that contains 11 and ptr points to the node that contains 18. newest points to a new node that contains 15. What is the result after the following statements are executed? ptr Inext = newest; newest. prev = ptr l ; ptr2, prev = newest; newest.next-ptr2; open with Print