Radar was used to check speeds on a random sample of 20 cars in rush-hour traffic on an Atlanta expressway with the following results (in miles/hour) 50 60 48 60 56 55 60 58 50 72 55 40 45 66 50 60 55 33 55 77

(a) find the median, and the compare with the mean

(b)find the first and third quartile

(c) make a box plot of the data using the five number summary. describe the shape of the distribution