c++ Write a client function that returns the back of a queue while leaving the queue unchanged. This function can call any of the methods of the ADT queue. It can also create new queues. The return...

c++

Write a client function that returns the back of a queue while leaving the queue unchanged. This function can call any of the methods of the ADT queue. It can also create new queues. The return type is ITemType, and it accepts a queue as a parameter.