Please solve neatly and with explanation, C++.

1) Suppose that q is a Queue that holds characters, and that x and y are character variables. Show the contents of q at each step of the following code segments: (a) Queue q; (b) Queue q; (c) Queue q; q.append('a'); q.append('a'); q.append('a'); q.serve (); q.append('b'); x = 'b'; q.append('b'); q.retrieve (x) ; q.append('x'); q.serve (); q.serve (); q.retrieve (y); q.append('c'); q.append('c'); q.serve (); q.append('d'); q.append (x); q.append(x); q.serve (); q.serve (); q.serve (); q.serve (); q.append(y)