⟩ What is the output of this program? #include <iostream> #include <cmath> using namespace std; class Complex { private double real; double imag; public Complex(double r = 0.0, double i = 0.0) real(r), imag(i) {} double mag() { return getMag(); } operator double () { return getMag(); } private double getMag() { return sqrt(real * real + imag * imag); } }; int main() { Complex com(3.0, 4.0); cout << com.mag(); cout << com; return 0 } a) 5 5 b) 4 5 c) 6 6 d) None of the mentioned