#3. [High Dive J Visitors at an amusement park watch divers step ott a plattorm 7U It (21.5 m) above a pool of water. According to the announcer, the divers enter the water at a speed of 56 mi/ h (25 m/ 8). (Air resistance may be ignored in this problem.) (a) Is the announcer correct in this claim? Please explain. (b) Is it possible for a diver to leap directly upward off the board so that, missing the platform on the way down, the diver enters the water at 25 m/ s? If so, what initial upward speed is required? Is the required initial speed physically attainable? How do you know? Please be sure vour work and reasoning are clear and complete