1) In a linked ist version of the cueue dass which operatiors require inear tine worst-case behavior? a) Dequeue b) Enqueue d) Size e) None of these operations cequite linear time 4) In a linked list version of the queue class, with the sentinel nodes header and trailer, which of t nodes will change during an insertion into a NONEMPTY queue? a) only header changes b) neither changes b) both changes 5) The values are removed from a stack in which order? a) hierarchical b) alternative c)reversel d) sequential e) random 10) In the linked list representation of the stack, which represents the top of the stack a) begin pointer b) trailer node c) avail pointer d) header node e) null pointer