question 2 n 3 answer only please

Given the C++program below, what kind of function call was performed? void foo (int x){ x+=1;} int main() int a=5 foo (a); pass by return pass by reference pass by value Dass by count Question 3 Given the C++ program below, what kind of function call was performed? void foo(int \&x) \{ x+=1;} int main() int a=5 foo a); \} pass by return pass by reference pass by value pass by count