1. The height of a basketball thrown in the air is given by the equation H(t) = -5(t - 2)2 + 22, where t is the time, in seconds, since the basketball was thrown. a) Determine the instantaneous rate of change of the height t seconds after it was thrown, using first principles [4 AJ b) Determine the instantaneous rate of change of the height 4 seconds after it was thrown. (1 A)