There are three voters: Voter 1 prefers a 10% tax rate, voter 2 prefers a 40% tax rate, and voter 3 prefers a 15% tax rate. Voters will vote for whichever candidate proposes a tax rate that is the closest to their most preferred rate. Let's also say two candidates, D and R, who each propose whatever tax rate will maximize their share of the votes. What tax rate(s) do we expect D and R to propose? why?