PLEASE HELP ASAP

a.Find a 95% confidence interval for the proportion of Canadians who believed there was the "correct level of response to this very real threat" in response to Covid-19 as of March 20-22 2020. Write in the form (x, y) where x and y are rounded to 3 decimal places.

b.Assuming that Ledger's methods produce unbiased samples, can we be confident that a majority (more than half) of Canadians on March 20-22 believed there was the correct level of response?

c. Suppose that another pollster asked the same question to 600 people, rather than 1508 people. Would you expect the margin of error on their poll to be larger or smaller than Ledger's and why?