Assume that final averages for one of your classes are typically normally distributed with a mean of 72 and standard deviation of 12.5. Your professor says that the top 8% of the class will receive an A; the next 20% a B; the next 42% a C; the next 18%, a D; and the bottom 12%, an F.

What is the minimum final average you must achieve to obtain an A?

What is the minimum final average you must achieve to obtain a minimum final grade of C?