3. US. companies spent more than $250 billion in advertising in 2005 (K. Delaney, \"Google Steps Further into World of Old Media,\" The Wall Street Journal, January 18, 2006, pp. A1, A6). The spending was as follows: Media Amount ($billions) Percentage % Cinema Direct mail Internet Ma-azines News-nets Outdoor Radio 20.6 8.03 TV 55.4 21.60 Other 45.8 17.86 a. Construct a bar chart and a pie chart for percentage. b. Which graphical method do you think is best to portray these data