a) Given a stack declaration int mystack= [MAX], apply stack as array by writing the coding for the following stack operations using function: i. push() ii. pop() iii. peek() (6 marks) (6 marks) (6 marks) b) Given a stack as linked list in Figure 1, illustrate a diagram with a brief description to show the process of removing X and Y from the stacks. stackTop Y Z Figure 1 (7 marks)