Deimos, a moon of Mars, is about 12 km in diameter with mass 1.5×1015 kg. Suppose you are stranded alone on Deimos and want to play a one-person game of baseball. You would be the pitcher, and you would be the batter!

Part A
With what speed would you have to throw a baseball so that it would go into a circular orbit just above the surface and return to you so you could hit it?
Express your answer with the appropriate units.

Part C
How long (in hours) after throwing the ball should you be ready to hit it?