A 2.9-kg firework is fired from the ground straight up on a planet with whose acceleration due to gravity is 3.3 m/s/s. You want the firework to explode when it is at a height of 106 m. You want the firework to be moving down at a speed of 13.7 m/s when it explodes. Use this information to find out how fast you should launch your firework and how much time you should have on your trigger.