In the engineering class mentioned in Problem 5.21, there are 2 A's 4 B's 8 C's 4 D's 2 E's (a) Create a vector of the grade distribution grades 32, 4, 8, 4, 24 Create a pie chart of the grades vector. Add a legend listing the grade names (A, B, C, etc.) (b) Use the interactive text option accessed from the figure window menu to add a text box to each slice of pie, with the grade shown in the text box. Save your modified graph as a fig file. (c) Create a three-dimensional pie chart of the same data, including a legend. 5.21 Let the vector G = [68, 83, 61, 70, 75, 82, 57, 5, 76, 85, 62, 71, 96, 78, 76, 68, 72, 75, 83, 93] represent the distribution of final grades in an engineering course. (a) Use MATLAB to sort the data and create a bar graph of the scores. (b) Create a histogram of the scores, using hist