A psychology professor assigns letter grades on a test according to the following scheme. A: Top 9% of score
s B: Scores below the top 9% and above the bättom 63%
C: Scores below the top 37% and above the bottom 17%
D: Scores below the top 83% and above the bottom 8%
F: Bottom: 8% of scores
Scores on the test are normally distributed with a mean of 75.8 and a standard deviation of 8.1. Find the
minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.