Problem 2. Consider the following program written in C-based pseudocode: int b; void foo (int x, int y)i b1: int main 0 int a1: b2 Eoo (a, b) printf ("sd sd ", a, b); For each of the following parameter-passing methods, what will be the output of the program? a) Passed by value b) Passed by reference c) Passed by value-result (be careful!l)