Bob is a lawyer with a large law firm. He is very good at preparing briefs and also is very good at typing. Bob's legal assistant Tom can prepare 1 legal brief in two hours and Bob can prepare 1 legal brief in one hour. In one hour Tom can type 6 pages and Bob can type 9 pages. Which person has the absolute advantage in preparing briefs and which has the comparative advantage in typing? Which person has the comparative advantage in preparing briefs and which in typing?