Solve the all parts of given problem:
Problem: A hot-air balloon is sinking toward the ground at a speed of 3.05 m/s, when the pilot drops a couple of sandbags overboard. The balloon immediately begins to experience constant acceleration, such that it shows in its descent, stops for an instant, and begins to rise. 24.8 seconds after dropping the sandbags, the balloon re-attains its original altitude.
Part A: How long did it take for the balloon to reach it maximum altitude?
Part B: How far did the balloon fall during that time?
Part C: What is the speed of the balloon when it returns to the original altitude?
I am having a hard time understanding these questions. So if you answer please explain how you found the solution.