Ali the trainer has two solo workout plans that he offers his clients: Plan A and Plan B. Each client does either one or the other (not both). On Friday there were 3 clients who did Plan A and 2 who did Plan B. On Saturday there were 8 clients who did Plan A and 4 who did Plan B. Ali trained his Friday clients for a total of 4 hours and his Saturday clients for a total of 9 hours. How long does each of the workout plans last?