Sales of automobiles in the United States fluctuate from month to month and year to year. The

Question:

Sales of automobiles in the United States fluctuate from month to month and year to year. The file AutoSales contains the sales for various automakers in July 2013 and the percentage change from June 2013 sales. (Data extracted from “How the Auto Industry Fared in July,”nyti. ms/ 1nnlCV2.)
a. Construct a treemap of the sales of autos and the change in sales from June 2013.
b. What conclusions can you reach concerning the sales of autos and the change in sales from June 2013?