In a certain town, 38.2% of the voters are Democrats and 61.8% of the voters are Republicans. In the last election 44.6% of the Democrats, and 45.9% of the Republicans voted.
a) If a citizen who voted in the last election is randomly selected, what is the probability that they are a Democrat?
b) If a citizen who is a Republican is randomly selected, what is the probability that they voted in the last election?