Upgrade the grades

A University has the following grading policy: - Every student receives a $grade$ in the inclusive range from 0 to 100 . - Any $grade$ less than $40$ is a failing grade. Sam is a professor at the university and likes to round each student's $grade$ according to these rules: - If the difference between the $grade$ and the next multiple of $5$ is less than $3$, round grade up to the next multipl