Jane is a diver in water that has a density of 1000 kg/m3 (a) If Jane is at a depth of 6.0 m underwater, what is the external pressure on her? (1 mark) (b) How does the body react to this change in pressure - what happens to the air pressure in the diver's lungs? (0.5 mark) (c) The diver reasons that if a typical 20 cm long snorkel tube works, a 6.0 m long tube should also work. If the diver uses this 6.0 m tube to breathe at a depth of 6.0 m, what is the difference between the external pressure on her and the air pressure in her lungs? Predict what would happen to the diver's lungs. (1.5 marks) (d) Jim is a novice scuba diver practising in a swimming pool. He takes in enough air from his tank to fully expand his lungs, before abandoning the tank and swimming to the surface. This diver ignores instructions and fails to exhale during the ascent. When he reaches the surface, the difference between the external pressure on the diver and the air in his lungs is 9.1 kPa. From what depth did this person start? What potentially lethal danger does this person face? (2 marks)