What is the output of the following code? (Note that there are no endl's, all output is on a single line) int vol(int s); int vol(int x, int y, int z=1); int main() { cout << vol(2) << "-"; cout << vol(3, 2) << "-"; cout << vol(3, 2, 4); return 0; } int vol(int s) { return s * s * s; } int vol(int x, int y, int z) { return x * y * z; }