Please show work

Open Ended (The Test will have around 3 of these questions) 1) A mountain climber encounters a gap in an ice field. The opposite side of the gap is 2.75m lower, and is separated horizontally by a distance of 4.1m. To cross the crevasse, the climber gets a running start and jumps in the horizontal direction. (A) What is the minimum speed needed by the climber to safely cross the gap? (B) What is the climber's velocity right before landing? 2) A ball is thrown from the top of one building 70m high toward a tall building 50 meters away. The initial velocity of the ball is 15 m/s at 40 degrees above the horizontal. How high above the ground will the ball the strike the opposite wall? 3) A tennis player hits a ball with an initial speed of 23.6 m/s perfectly horizontally. The ball is 2.37 meters above the ground when struck by the racquet. If the net is 12 meters from the ball (in the x -direction), and the net height is 0.90 meters, by how much does the ball clear the net? 4) A rock is tossed at a 42 degree angle at an initial height of 1.2 meters from the ground. 1.6 seconds after release, the rock reaches its maximum height. (A) Find the initial velocity (B) The Maximum height (C) The velocity at maximum height