Pls answer it with more explaination, thank you. If and when selecting a significance level, choose only from {.10, .05, 02}.

2. What percentage of Bostonians love cats? Dan, Scott, and Autumn will work completely separately on answering that question. a. Dan ran a poll of 1600 Bostonians, which had 400 of them loving cats. Give his complete standard analysis. [40 points] b. Scott must poll accurately to within 2.1%. How many Bostonians must Scott plan to poll? [5%] c. Autumn plans to poll 780 Bostonians. What can she say, in advance, about her poll's margin of error. [5 points]