The table to the right shows the results of a survey in which 2564 adults from Country A, 1121 adults from Country B, and 1083 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c).

1. Construct a 90% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming.

(Round to three decimal places as needed.

2. Construct a 90% confidence interval for the proportion of adults from Country B who say human activity contributes to global warming. (Round to three decimal places as needed.

3. Construct a 90% confidence interval for the proportion of adults from Country C who say human activity contributes to global warming. (Round to three decimal places as needed.)

Adults who say that human activity contributes to global warming
Country A	65%
Country B	88%
Country C	94%