Below are the final exam scores of twenty introductory calculus students. 57,66, 69, 71, 72, 73, 74, 77, 78, 78, 79,79, 81, 81, 82, 83, 83, 88, 89,94 a. Computer the mean score. b. Compute the five number summary of these scores. c. Create (by hand) a box plot of these scores. d. Create (either by hand or using Excel) a histogram of these scores. Comment on the shape of the distribution.