統計学の問題です！英語ですがよろしくお願いします。 A study based on a random sample of US citizens eligible to vote reports that with 99% confidence, the proportion of people eligible to vote who actually voted in the 2016 election is between 56.8% and 65.2%. a) Estimate the sample size of the study. Be sure to present your reasoning. b) In the 2012 election, 57.5% of US citizens eligible to vote have actually voted. Using alpha = 0.05, is there sufficient evidence that the proportion of voters has increased? Explain your reasoning, or present an appropriate hypothesis test.