(5 pts) Q4. What is displayed by the program fragment below? #include int main() { int a 3, b = 9; int *pa, *pb, *pc; pa = &a; pb = &pb; pc = pa; pa = pb; pb = pc; printf("%4d 4d 4d 4d %4d ", a, b, *pa, *pb, *pc); return 0;