Use R when ever it is relevant. The following data set shows the mid-term grade of a Biology class of 30 students.

78 45 67 56 88 26 89 91 75 80

58 68 77 82 79 80 93 46 55 62

78 86 89 78 66 78 81 63 90 83

(a) Make a frequency distribution for the data. Use a class width of 10.

(b) Draw a histogram for the data. What can you say about the shape of the distribution?

(c) Complete the table in categorizing data as below (note that interval ranges are different from part (a)).

Range	Grade	Frequency
85-100	A
75-84	B
65-74	C
50-64	D
0-49	F

(d) Draw a pie chart to display the distribution of grades in part (c).