C++ Help!

Which of the following is a valid function prototype for the following function definition? void TotalAmount(int a, float &b, string name); { //........... }

void TotalAmount(int &, float &, string &); void TotalAmount(int, float &, string); intTotalAmount(int, float, string);

What is the output of the following program segment? (Answer is not 5 10)

int main()

{

int num = 5;

cout << num <<" ";

change(num);

cout << num << endl;

return 0;

}

void change (int num)

{

num = 10;

}

Assume a program uses the statement name = getFirstName(); to call the getFirstName function. (name is a string variable). Which of the following is a valid function header for the getFirstName function? string getFirstName(string firstName) string getFirstName() void getFirstName()