1 pts When inserting Into an alphabetically sorted list O if the list is singly linked, we will need an extra "trail" pointer O if the ist is doubly linked, we will need an extra "trail pointer O we will never need the trail" pointer you cannot insert in singly linked list because it is not possible to traverse the list backwards Question 12 1 pts When comparing array and linked list traversal what is the list 'equivalent af i+ O temp pt link pt+ temp,pt temp pe Jink p ists carnot be traversed like this Question 13 1 pts