A ball is thrown upward in the air, and its height above the ground after t seconds is H(t) = 89t 4.905 meters. a) Find the time t when the ball will be traveling upward at 22.25 meters per second. Give your answer as a decimal approximation with at least 3 decimal places. t= b) Find the second derivative of H(t) H'' (t) = c) In the context of this problem, what is the meaning of the answer you found in b) seconds