Exercise 2 (1s points) What is the output of the following program? Explain your results and why certain elements of the array did or did not change. linclude ciostream> using namespace std; int happylint a): int grumpylint& a, int& b); void print_array(const int all. int n): int main() const int N 5; int arr[N] 2, 1, 10, -1, 0) cout