Final exam scores follow an approximately normal distribution with mean 76. and standard deviation 8.

A) If the instructor assigns C to students who get grades between 70 and 80, what proportion of students will get a C?

B) If the instructor assigns a grade of A to the top 95% of the students, what is the minimum grade required to get an A?

C) If 5 students are randomly selected from this course, what is the probability that exactly 2 of them have obtained C in the final exam?