(b) Why can the use of protected data members be problematic? (3 marks) (c) In computer programming the "queue" is a very important data structure. A queue can be thought of as being similar to a line of people waiting to pay in a supermarket. A queue has a front and a back. Data enters the queue at the back and leaves at the front. Create a class which models a queue of integers and give the complete implementation. Ensure that you provide methods for adding items to the queue and for removing items from the queue. There should also be a method which determines if the queue is empty or not. You may assume that objects of this class will only store a small number of integers at any one time so performance in terms of speed is not a critical issue