The table to the right shows the results of a survey in which 2600 adults from Country A,1119 adults from Country B, and 1056 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c).

Country A 61%

Country B 68%

Country C 95%

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