2.15 The ages of a random sample of people who attended a recent soccer match are as follows:

23 35 14 37 38 15 45 12 40 27 13 18 19 23 37 20 29 49 40 65 53 18 17 23 27 29 31 42 35 38 22 20 15 17 21

a. Find the mean age.

b. Find the standard deviation.

c. Find the coefficient of variation.