A professor gives an exam to all her students. After grading the exams, she finds the scores have a mean of 75 and a standard deviation of 8.3.

a. If a student needs to score at least 2 standard deviations above the mean to get an "A", what score would they need?

b. Students scoring less than 1.5 standard deviations below the mean are considered failing. What grade would be the cutoff score for failing?