1.The following table shows the percentage of individuals in each age group who use an online tax program to prepare their federal income tax return (Complete Tax website, November 9, 2012).

Age	Online Tax Program (%)
18-34	16
35-44	12
45-54	10
55-64	8
65+	2

Suppose a follow-up study consisting of personal interviews is to be conducted to determine the most important factors in selecting a method for filing taxes.

a. How many 18-34 year olds must be sampled to find an expected number of at least 25 that use an online tax program to prepare their federal income tax return? b. How many35-44 year oldsmust be sampled to find an expected number of at least 25 that use an online tax program to prepare their federal income tax return?

c. How many65+ year oldsmust be sampled to find an expected number of at least 25 that use an online tax program to prepare their federal income tax return?.

d. If the number of18-34 year oldssampled is equal to the value identified in part (a), what is the standard deviation of the percentage that uses an online tax program (to 2 decimals)?

e. If the number of35-44 year oldssampled is equal to the value identified in part (b), what is the standard deviation of the percentage that uses an online tax program (to 2 decimals)?