Jo-Jo will illustrate the time-distance relationship of free fall by steppig off a high, vertical cliff with a timer in one hand and a marker in the other. For each second of fall he makes a mark on the cliff face. Jojo wants to determine how far he will fall during each second for the first 5 seconds. He requests you plot the results on a distance versus time graph for a visual display. He also wants to open his parachute when reaching 60mi/h. At what time, or between which seconds, shoud he do this?