Who played Charlie Babbitt in 'Rain Man'?

Who played Daniel LaRusso in 'The Karate Kid'? Who played Mr. Miyagi in 'The Karate Kid'? Who played Ethan Hunt in 'Mission: Impossible'? Who played Rod Tidwell in 'Jerry Maguire'? Who played Raymond Babbitt in 'Rain Man'? In which film is Raymond Babbitt a character? In which film is Benjamin Braddock a character? Who played Mrs. Robinson in 'The Graduate'?