What is wrong with the following code:

#include using namespace std;

double foo( int x1=4, int x2, int x3){ return (x1+x2+x3)/3; } int main() { cout << foo(7,2)<

The default values of function foo have to be the last values in the function arguments.

Function foo has no prototype

Function foo needs three arguments not two.

The return type of function foo shuld be int.