Question 4: (a) Show the content of a new circular array based queue of size 7 after we perform the following: enqueue 6, 9, 1, 3, and 2, in this order, dequeue twice, enqueue 7, 5, and 1, dequeue twice again, enqueue 6 and 4. (2 marks) [o] 1 2] 13 4 5 6 What are the advantages and disadvantages of the linked structure based queue ADT as opposed to the circular array based version? (4 marks) (b)