... ralph. by some coincidence, the pilot, co-pilot, and navigator have the same first names as these passengers, but not necessarily respectively. following are additional facts about these men: 1. the passenger with the same name as the navigator lives in los angeles. 2. the passenger who lives nearest the navigator smokes a pipe. 3. ralph, a member of the crew, recently beat the co-pilot at racektball. 4. passenger clifford lives in boston. 5. passenger leon is a nonsmoker. 6. the navigator lives halfway between boston and los angeles. what are the names of the pilot, co-pilot, and navigator?