QUESTION 19 Depending on the circumstances, the dequeue method of our Linked Queve class sometimes throws the Queue UnderflowException Trus False QUESTION 20 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 O 04 QUESTION 21 What happens if you include the following code in an application that has access to the Collection Interface? CollectionInterface currentCollection = new CollectionInterface(): Paragraph Arial 3 (12pt) -E T-. TT. "T ft Mashup EMTH SS