What will be outputted in the following code (please put only numerical answers with no extra spaces) x is: y is: z is: 1 2. 3 4 #include using namespace std; int addSomeStuff (int &numi, int &num2, int num3=0); 5 6 7 8 9 int main() { int x=1; int y=2; int z=3; z=addSomeStuff(x,y)+addSomeStuff(x,y,z); cout