An object is dropped from the observation deck of the Skylon Tower in Niagara Falls, Ontario. The distance, in metres, from the deck at t seconds is given by d(t)=4.91. a. Determine the average rate of change in distance with respect to time from 1 to t = 3. b. Determine the instantaneous rate of change in distance with respect to time at 2 s. c. The height of the observation deck is 146.9 m. How fast is the object moving when it hits the ground?