The following frequency histogram presents the heights, in inches, of a random sample of 100 male college students. 27FX 24 21- 18- Frequency 12- w 63 66 69 72 75 87 90 93 96 Height (inches) a) How many classes are there? Use a sentence to briefly explain how you got your answer. b) What is the class width? Show work or use a sentence to briefly explain how you got your answer. c) What percentage of students are less than 72 inches tall? Show work to support your answer. Also write a brief explanation for why you used the numbers that you did to calculate your answer. d) What percentage of students are at least 90 inches tall? Show work to support your answer. Also write a brief explanation for why you used the numbers that you did to calculate your