In a certain presidential election, Alaska's 40 election districts averaged 1,951.8 votes per district for a candidate. The standard deviation was 572.2. (There are only 40 election districts in Alaska.) The distribution of the votes per district for one candidate was bell-shaped. Let X = number of votes for this candidate for an election district.

a) Find the probability that a randomly selected district had fewer than 1,600 votes for this candidate. (Round your answer to four decimal places.)

b) Find the probability that a randomly selected district had between 1,800 and 2,000 votes for this candidate. (Round your answer to four decimal places.)

c) Find the third quartile for votes for this candidate. (Round your answer up to the next vote.)