The file Marketpenetration contains Facebook penetration values (the percentage of the country population that are Facebook users) for 22 of the world’s largest economies:

56 57 43 55 42 35 7 25 42 17 43 6 31 28 59 20 27 36 45 80 57 56 Source: Data extracted from slidesha.re/ODv6vG.

a. Compute the first quartile 1Q12, the third quartile 1Q32, and the interquartile range.

b. List the five-number summary.

c. Construct a boxplot and describe its shape.