A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent changes in climate are primarily due to human activity. Find the minimum sample size necessary to...

Extracted text: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent changes in climate are primarily due to human activity. Find the minimum sample size necessary to achieve a margin of error of less than 2%. a. Assuming no previous estimates are available. Round your answer up to the next integer. b. Assuming a previous estimate of 0.30. Round your answer up to the next integer.