Astronomers discover a new giant planet orbiting a binary star system. The planet has a couple of moons, one of them has

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Astronomers discover a new giant planet orbiting a binary star
system. The planet has a couple of moons, one of them has a nearly
circular orbit and completes one revolution around the planet in 34
earth-days. This orbit’s diameter is 700 thousand miles. Find a)
the acceleration of the moon b) the mass of the planet c) work done
on the moon by the gravitational pull of the planet in 34 days d)
the gravitational acceleration on the surface of the planet,
assuming it is a perfect sphere and is 12 thousand miles across in
diameter.