These data summarize results of a survey that asked teens and adults to identify the single top government research priority. (Business Week, December 6, 2004.)

(a) Compare the responses of adults to those of teens using two pie charts. Be sure to add a category for the Other responses. How does the presence of a large group of Other responses affect the use of these charts?
(b) Compare the responses using a bar chart. Do you have to show the other category when using the bar chart?
(c) If each respondent in the survey listed several areas for research, would it then be appropriate to form a pie chart of the values in a column of the table?

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Adults Teens Research Area Alternative energy Stem-cell research Water purification Space exploration 23 4 20 15 12