Kaitlin the trainer has two solo workout plans that she offers her clients: Plan A and Plan B. Each client does either one or the other (not both). On Monday there were 2 clients who did Plan A and 5 who did Plan B. On Tuesday there were 8 clients who did Plan A and 3 who did Plan B. Kaitlin trained her Monday clients for a total of 6 hours and her Tuesday clients for a total of 7 hours. How long does each of the workout plans last?