A cylindrical vase has a diameter of 6 inches. At the bottom of the vase, there are 9 marbles, each of diameter 3 inches. The vase is filled with water up to a height of 12 inches. Which of the following could be used to calculate the volume of water in the vase?

1. π(3in)2(12in) − 1.5( four over three π(9in)3)

2. π(12in)2(3in) − 1.5( four over three π(9in)3)

3. π(3in)2(12in) − 9( four over three π(1.5in)3)

4. π(12in)2(3in) − 9( four over three π(1.5in)3)