A golfer tees off on a platform above the ground, giving ball A an initial speed of 69.0 m/s and an initial direction of 40.0° above the horizontal. If ball A is in flight for 10.00 sec, how high above the ground is the platform, (b) what is the horizontal displacement of ball A when it lands on the ground, (c) what is the ball A's landing angle, and (d) what is the maximum height that ball A can reach? If next golfer in the group hits ball B at an angle 55.0° above the horizontal and ball B has the same horizontal displacement as ball A, (e) what is the initial speed of ball B, and (f) how long is ball B in flight? (Air resistance can be neglected.)