An Economics professor assigns letter grades on a test according to the following scheme. A: Top 14% of scores B: Scores below the top 14% and above the bottom 60% C: Scores below the top 40% and above the bottom 18% D: Scores below the top 82% and above the bottom 8% F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 76.9 and a standard deviation of 7.4. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary. 80 83 85 58