WHAT WILL BE THE OUTPUT OF THIS C CODE ?

#include <stdio.h>

int z;

int f1( int x)

{

if (x<=4)

return 8;

else

return x+f1(x-1);

}

int f2( int &x, int & y)

{

x=x+1;

y=y+2;

return x+y;

}

int main()

{

int k=3,m=5,r=0;

printf("1) %d %d \n",f1(k),f2(m,r));

r=f1(m);

printf("2) %d %d \n",r,f2(r,r));

k=f1(r-20);

printf("3) %d %d \n",k,r);

return 0;

}