Chapter 6 Practice Exercises 1- Write a C program to add and subtract any two given integer numbers using pointers 2- Write a C program to find the factorial using a function and pointers. 3- Write a C program to find the square of an integer number using a function and pointers. - Write a C program to find the area and perimeter of a rectangle using a function and pointers. 5- Write a C program to find the larger of two integers numbers using a function returning pointer