The terminal velocity of a skydiver in prone (horizontal) position is assumed to be 60 m/s when air conditions are 100 kPa and 300 K. A stunt coordinator for a movie is planning a skydiving scene in which various objects are intended to fall with a human skydiver and remain approximately in the same relative position with the skydiver. In order to achieve this result, the terminal velocity of all objects must be equal to that of the skydiver. The prop department can build realistic replicas of each object, but must use materials having differing densities to achieve the desired free fall velocity. The objects are: a) sphere of diameter 0.1 m, b) a sphere of diameter of 1 m, c) a long cylinder having diameter of 0.1 m falling in horizontal orientation, d) a cube of side length 0.1 m, assuming the cube spins and tumbles as it falls. Find the required SG of the material for each object.