The file MobileCommerce contains the following mobile commerce penetration values, the percentage of the country population that bought something online via a mobile phone in the past month, for twenty-eight of the world's economies:

Data extracted from www.slideshare.net/wearesocialsg/digital-social-mobile-in-2015.
a. Compute the first quartile (Q1), the third quartile (Q3), and the interquartile range.
b. List the five-number summary.
c. Construct a boxplot and describe its shape.

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17 15 15 13 27 12 20 23 9 9 16 6 19 14 11 14 8 15 23 11 37 17 11 19 27 18 18 15