(a) A cuttlefish has porous bones that have a density of 6.20 x 10kg/m, whereas the rest of its body has a density of 1067 kg/m. It lives in saltwater of density 1026 kg/m. In order for the cuttlefish to have the same overall density as the water, what percentage of the volume of its body consists of porous bones? (b) The cuttlefish typically lives at a depth where the absolute pressure is 16 atm. Determine the depth.