Answer:
(1) 97
(2) 385
(3) 9604
Step-by-step explanation:
The (1 - <em>α</em>) % confidence interval for population proportion is:

The margin of error in this interval is:

The formula to compute the sample size is:

(1)
Given:

*Use the <em>z</em>-table for the critical value.
Compute the value of <em>n</em> as follows:

Thus, the minimum sample size required is 97.
(2)
Given:

*Use the <em>z</em>-table for the critical value.
Compute the value of <em>n</em> as follows:

Thus, the minimum sample size required is 385.
(3)
Given:

*Use the <em>z</em>-table for the critical value.
Compute the value of <em>n</em> as follows:

Thus, the minimum sample size required is 9604.