start exercise 7 Queues with just task in comment
initial thoughts on how to do it
complete exercise 7 stacks
$ java E07Queue
There are 0 requests in the queue.
Pushing 5
Pushing 8
Pushing 12
There are 3 requests in the queue.
Retrieving first request in the queue, value= 5
Pushing 13
There are 3 requests in the queue.
Retrieving first request in the queue, value= 8
Retrieving first request in the queue, value= 12
There are 1 requests in the queue.
Retrieving first request in the queue, value= 13