Can you help me solve this ?

A sample of the test scores from Mr. D's old stats class is given below: 84, 67, 85, 82, 65, 84, 71, 99, 78, 88, 52, 40, 94, 82, 95, 81, 72, 64, 58, 91, 88, 96, 75, 90, 85, 89, 95, 85, 85, 86, 91. a. Make a relative frequency histogram of the data using 6 classes. (200 pts homework or 3 pts test) b. According to Chebyshev's Theorem, for the given data, between what two values could you expect to find 75% of the data values? (100 pts homework or 2 pts test)