Mrs. Richards is having one big birthday party for all seven grandchildren because each celebrates a birthday in the same month. She arranged candles in combinations that show each grandchild's age. Each candle figure represents a certain number of years.

- The youngest grandchild will be 2 on this birthday.
- Louis and Paul are twins. They will be 9.
- Marley and Keith are a year apart.

We know the following about the grandchildren's ages.

**How old will each of the grandchildren be on this birthday? **