1. Develop a C++ program to demonstrate the output for f1(10) and f2(5) incorporating the following two functions f1 and f2. [10] int f1(int n) { if (n == 0) { return 1; } else { return f2(4, f1(n-1)); }} int f2(int n1, int n2){ if (n1 == 0) { return 0; }else { return n2 + f2(n1 - 1, n2); }}