required): int i,; switch (i) case 2:printf ("2 "); break, case 3printf ("3 "); default: printf ("default "); (1)What is the screen output of the following C program (no explanation required)? #include int fl(int a, int b, int c)( return (a+b*c); int f2 (int a, int b) [ int cfl (a, b, 3); return c+1; int main (void) %d ", printf("result return 0; is f1(-1,f2(2,4) ,2))