An old man calls in to a radio station during a contest... ""Welcome to 99.5 The Lounge, you're on the air. We're currently holding our annual quiz contest; answer any of three questions right, and you'll win $500. You ready?"" ""That I am."" ""All right, let's begin. The first question is... What has four wheels and travels on roads?"" ""That would be a car, right?"" ""Almost, but not quite. The answer we were looking for is 'a Toyota Prius.' You still have two more chances for that $500, so it…