After spending two hours in the system a particular type of virus starts making one copv of itself every hour. $($Note that the new copy will also start making a copy after it has spent two hours in the system.$)$ If one virus just entered the system, write a C program to find the number of viruses after $n$ hours. The input $n$ is given to you $(n$ not less than $12).$ Write a function which does this. $($You can use $C$ or python, your choice$)$