a$.$ Define a C$++$ function $($name it function$\_$StudentID where StudentID is your actual student ID

number$)$ that has an integer input $(N)$ and a double input $(x)$ and returns a double output $y,$ where

$y={\displaystyle \underset{k=1}{\overset{N}{}}}(\frac{2xk+1}{k+1}+\frac{k+1}{2})$

The value of $N$ should be positive.