The annual ranking of the FT Global 500 2013 provides a snapshot of the world's largest companies. The companies are ranked by market capitalization-the greater the stock market value of a company, the higher the ranking. The market capitalizations (in $billions) and the 52-week change in market capitalizations (in percentages) for companies in the Automobile & Parts, Financial Services, Health Care Equipment & Services, and Software & Computer Services sectors are stored in FTGlobal500. (Data extracted from ft.com/intl/indepth/ft500.)

a. Construct a treemap that presents the each company's market capitalization (size) and the 52-week change in market capitalization (color) grouped by sector and country.

b. Which sector seems to have the best gains in the market capitalizations of its companies? Which sectors seem to have the worst gains (or greatest losses)?

c. Construct a treemap that presents each company's market capitalization (size) and the 52-week change in market capitalization (color) grouped by country.

d. What comparison can be more easily made with the treemap constructed in (c) compared to the treemap constructed in (a)?