One year there were two guys who were taking Chemistry. These guys were so confident going into the final that the weekend before, they decided to go up to UVA and party. However, with their hangovers and everything, they overslept all day and didn't make it back to Duke until early Monday morning. Rather than taking the final then, they found the Professor and explained to him why they missed it. They told him that they went up to UVA had a flat tire on the way back and didn't have a spare. He thought this over and agreed they could make up the final the next day. The two guys were relieved and very proud of their story. They studied that night and went in the next day. He placed them in separate rooms and handed each of them a test booklet. They looked at the first problem, which was something simple about molarity and was worth 5 points. They did that problem and turned the page. They were unprepared, however, for what they saw on the next page. WHICH TIRE? (95 points)