Elsa 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 Wednesday
there were 6 clients who did Plan A and 5 who did Plan B. On Thursday there were 2 clients who did Plan A and 3 who did Plan B. Elsa trained her Wednesday
clients for a total of 7 hours and her Thursday clients for a total of 3 hours. How long does each of the workout plans last?