6. Diving bells provide a method of transporting divers while under pressure and of supplying breathing gas to the diver. Diving bells may have an open bottom (i.e., a "wet" bell) or closed. Consider a diving bell with volume of 1 m that is lowered into the ocean from a ship. At the surface, the temperature is 20C; at 30 m depth, the temperature is 4C. a) If the diving bell is open, calculate the volume of the air space in the bell at depths of 10, 20, and 30 m. b) If the diving bell is closed, calculate the pressure on the bell when it is at a depth of 30 m.