View the 20,000 people represented in the donations database (on the companion site) as a sample from

Question:

View the 20,000 people represented in the donations database (on the companion site) as a sample from a much larger population. Of these 20,000 people, 989 made a donation in response to the current mailing.
a. Find the 95% confidence interval for the population percentage who would make a donation.
b. Find the 99% confidence interval for the population percentage who would make a donation.