$\begin{array}{|cc|}\hline & \text{Score, S, on Final Exam}\\ & S<70& 70\le S<80& 80\le S<90& 90\le S\le 100& \text{Total}\\ \text{Undergraduate}& 16& 14& 17& 3& 50\\ \text{Graduae}& 4& 10& 19& 7& 40\\ \text{Total}& 2024& 36& 10& 90\\ \hline\end{array}$

1) Find the probability that a student scored 80 or above and was a graduate student

2) Given that a student scored below 80, find the probability that the student was a graduate student

3) Find the probability that an undergraduate student scored 90 or above