a) A submarine is being designed by a student. It is intended to be neutrally buoyant, i.e. it will be fully submerged but neither floating nor sinking (it will float within the water), as shown in the picture below: Submarine If the mass of the submarine is 67900 kg and the density of water is 1010 kg/m", what should the volume of the submarine be? V m b) The submarine, while operating, wants to surface so that only 70% of its volume is below the water. How much mass must the submarine lose to surface in this way? mloss kg c) The submarine is able to float in water, but not in air. This is because: The volume of the submarine is higher in air than it is in water. The volume of the submarine is lower in air than it is in water. Air is more dense than water, leading to a higher buoyancy force. Air is less dense than water, leading to a lower buoyancy force