You throw a small stone straight up in the air. Your hand accelerates it upwards from rest at ground level with an acceleration a = 5.7, moving the stone upwards a distance h = 1.2 m. The stone then leaves your hand and enters free-fall. A. How long does it take for the stone to leave your hand? B. What is the speed of the stone the instant that it leaves your hand? C. What is the maximum height the stone reaches? D. After the stone enters freefall, how long does it take to reach the ground?