Your grandfather has metal-working tools in his workshop and he has helped you to design your own one-person submarine made out of aluminum for you to test out in the local lake. The mass of the submarine is 1,280 kg and its total exterior volume is 9.20 m3. You, of mass 79.0 kg, take the submarine to the lake and climb inside. Determine the volume of water (in m3) that you must allow to enter the holding tanks of your submarine to make it sink.