Which of the following statement is correct about the program given below?

#include<iostream.h> 
struct Tab
{
    short n;
};
int main()
{
    Tab b;
    Tab& rb = b;
    b.n = 5;
    cout << b.n << " " << rb.n << " ";
    rb.n = 8;
    cout << b.n << " " << rb.n;
    return 0; 
}

#include<iostream.h> 
int main()
{
    float Amount;
    float Calculate(float P = 5.0, int N = 2, float R = 2.0);
    Amount = Calculate(); 
    cout<< Amount << endl; 
    return 0;
}

float Calculate(float P, int N, float R)
{
    int Year = 1;
    float Sum = 1 ;
    Sum = Sum * (1 + P * ++N * R);
    Year =  (int)(Year + Sum);
    return Year; 
}