This month there are two related problems:

- You are given two containers, one with a capacity of 7
cups, the other with a capacity of 11 cups. Neither
container has any markings on it. Using only these two
containers, how can you measure out a quantity of
exactly 2 cups?
- Now you are given three containers with capacities of 6, 10, and 15 cups. How can you measure out a quantity of exactly 7 cups?