U.S. companies spent more than $250 billion in advertising in 2005 (K. Delaney, In Latest Deal, Google Steps Further into World of Old Media, The Wall Street Journal, January 18, 2006, pp. A1, A6)....

U.S. companies spent more than $250 billion in advertising in 2005 (K. Delaney, In Latest Deal, Google Steps Further into World of Old Media, The Wall Street Journal, January 18, 2006, pp. A1, A6). The spending was as follows:

a. Construct a bar chart and a pie chart.

b. Which graphical method do you think is best to portray these data?