Fruit punch, then a bigger jug

To make a fruit punch, Anong stirred together 3 cups of pineapple juice, 9 cups of orange juice and 15 cups of water.

1. (a) In the simplest form, find the ratio of the number of cups of pineapple juice to the number of cups of orange juice to the number of cups of water.

2. (b) Later, Anong made a bigger jug of the same punch. This time she poured in 9 cups of pineapple juice. If the ratio stayed the same, how many cups of orange juice did she need?