I dont understand question 13, 14 please explain step by step

I dont understand question 13, 14 please explain step by step

I dont understand question 13, 14 please explain step by step

in 13 whats the point of x= 5; if it doesnt count ?

E. Oor -5 depending on the value of m entered by the user 12. When a function argument is called by reference: A. B. The program will make a copy of the value of the argument The prog The program will only use global variables to access any reference argument The program will use the address of the argument to read and write data. The program will make a new address for the argument to read and write th function and will let the main program refer to the old address after the fun X 13. What is the output of the following program? #include using namespace std; int f(); int x = 10; int main() { int x = f(); cout using namespace std; int main() { int n; int sum; int index; sum = 0; index = 1; cout > n; i++) { for (int i = 0; i