I need help with determining the output of these C++ statements.

Please explain your solution

float a = 9.8, b = 7.2, *ptr1, *ptr2;

short c = 13, *ptr3;

ptr1 = &a;

ptr2 = &b;

ptr3 = &c;

If the following statements, along with the five statements given above, are executed as part of complete programs, what will be printed? In any of the problems, if you think an error message will be produced, explain why.

(a) int j;

j = ptr3 - ptr1;

cout << j;

(b) short j;

j = ptr2 - ptr1;

cout << j;

(c) ptr2 = 3*ptr1;

cout << ptr2;

(d) cout << ptr2 - 1;

(e) cout << *(ptr2 - 1);

(f) cout << (int)ptr3 - (int)ptr1;