4 A person jumps from a diving board above a swimming pool. At time I seconds after leaving the board, the person's height above the surface of the pool, s metres, can be modelled by the function s(1) = 10 +5t - 12. Find: a the height of the diving board above the surface of the pool b the time between the person leaving the board and hitting the water c the velocity and acceleration of the diver upon impact with the water. Interpret your answers in the context of this