Question 13 Which segment of code inserts a new node (pointed to by pointer X) at the beginning of a single linke list (as defhined in Q12)? The start pointer points to the beginning of the list. start-> next . X: X-start x-> next-start start-X->next; X-> next-start-, next: start-x; x->next-start, startX Question 14 5 pts Which segment of code inserts a new node (pointed to by pointer X) at any position Gie neither fhrst nor lbast) ofa single linked list? Assume prev pointer points to the previous position of the new node. O x- next- prev, prevnextX 0 X-,next-per-,next prev next-x. O Xx> next prev-next: prev next-X- next Question 15 5 pts a binary tree contains m nodes at level L: it contains at most nodes at level L+1