QUESTION 10 If you enqueue 5 elements into an empty queue, and then perform the isEmpty operation 5 times, the queue will be empty again, True False QUESTION 11 In your book, within the LinkedQueue the front and rear variables are of type LLNode holding references to the front and rear nodes of the underlying linked list, and the numElements variable is an int and holds the current size of the queue. Which of the following code sequences could be used to correctly implement the isEmpty operation? return (reare null); return (front == null; return (numElements - 0); All of these are correct. QUESTION 12 A queue is a first in, first out structure, True False QUESTION 13 Any class that implements the Comparable interface must provide a method