According to the News Generation, Inc. Web site€™s Radio Facts and Figures, which has as its source Arbitron Inc., the mean number of radios per U.S. household was 5.6 in 2008. A random sample of 45 U.S. households taken this year yields the following data on number of radios owned. Use single-value grouping.

a. Determine a frequency distribution.
b. Obtain a relative-frequency distribution.
c. Construct a frequency histogram based on your result from part (a).
d. Construct a relative-frequency histogram based on your result from part (b).

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4 10 4 7 4 4 5 10 6 7 5 3 4 9 5 4 4 7 8 6 4 4 4 10 7 9 3