What is the screen output of the following fragment of C code (no explanation required)? int fl (int a, int b, int c) l b=(a+b*c); return (b-1) int f2 (int a, int e)( int b= f1(a, a*c, c) ; return bta; int main () %d ", printf ("result return 0; is f1 (4, f2 (3 , 2) , 6) )