2. (50 points) Re-implement the following code by defining int copy_a as an integer pointer variable called ptr_a. Keep int as an integer variable.

#include int main() { int a = 15; int copy_a = a; a /= 3; copy_a = a; copy_a++; a = copy_a; if(copy_a == a) { printf("Copy_a = %d " , copy_a); printf("a = %d " , a); printf("Therefore, copy_a = a = %d " , copy_a); } return 0; }