Twenty vehicles were chosen at random upon arrival at a vehicle emissions inspection station, and the time elapsed (in minutes) from arrival to completion of the emissions test was recorded for each of the vehicles:

(A) Use a graphing calculator to draw a histogram of the data, choosing the five class intervals 2.5 –7.5, 7.5 –12.5, and so on.

(B) What is the probability that for a vehicle chosen at random from the sample, the time required at the inspection station will be less than 12.5 minutes? That it will exceed 22.5 minutes?

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5 18 12 15 11 14 4 9 7 10 20 13 14 12 8 20 12 26 11 17