Solve the all parts of given question:
Question: While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 5.83 m/s. The stone subsequently falls to the ground, which is 15.5 m below the point where the stone leaves your hand.
Part A: At what speed does the stone impact the ground?
Part B: How much time is the stone in the air?
Please explain how you got the numbers and calculations. Thank you.