Suppose you start with an empty queue and perform the following operations: enqueue 1, dequeue, enqueue 2, dequeue, enqueue 3, enqueue 4, dequeue, dequeue, enqueue 5. What are the resultant contents of the queue, from front to back?
1, 2, 3, 4, 5
1, 2, 3, 4
4
1
None of the choices.