Given a struct as follows:

Struct myStack{

int *data; int size;

}; typedef struct myStack Stack;

Write a C program to implement the following functions:

a. void Stack_Init(Stack *S, int size);

//creates a stack of this size. You need to allocate memory appropriately (you can use a dynamically allocated array if you wish).

b. int peek(Stack *S);

//returns the value of the element on top w/o removing it

c. void Stack_Push(Stack *S, int d);

//pushes some integer onto the stack

d. int Stack_Pop(Stack *S);

//returns the value of the element on top and removing it