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The following data represent the highway fuel consumptions (in miles per gallon) for a sample of cars. Use the data to answer parts a through d.

42 23 38 45 38 46
25 45 29 35 29 36
24 43 39 35 27 37
22 24 26 28 41 43
33 24 42 36 23 23

a. Construct a frequency distribution for the data using five classes. 

b. Construct a relative frequency histogram of the data.