(Answered) An art history professor assigns letter grades on a test

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An art history professor assigns letter grades on a test according to the following scheme.

A: Top 13% of scores

B: Scores below the top 13% and above the bottom 56%

C: Scores below the top 44% and above the bottom 21%

D: Scores below the top 79% and above the bottom 9%

F: Bottom 9% of scores

Scores on the test are normally distributed with a mean of 79.7 and a standard deviation of 8.4. Find the numerical limits for a B grade. Round your answers to the nearest whole number, if necessary.

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