You are writing a C++ program to create a list of integer numbers to be stored in a queue data structure. Each number is stored in a node. Your program used two different structures. One structure is used to define the node and the other structure is used to define the head of the queue. Show your code for: (a) structure definition for a node and a queue head used in the queue. (7 marks) (b) allocate and initialize the queue head. (4 marks) (c) insert a new number into the queue. (5 marks) (d) print the first and the last number in the queue. (4 marks) (e) remove a number from the queue. (5 marks) [25 Mark]