A planet having radius of 6.28 x106 m consists of a mass of 6.05 x 1024 kg, its moon has a mass of 7.31 x1022 kg, and their center-to-center distance is 3.79 x 108 m. (As the planet and moon orbit one another, their centers orbit about their common center of mass.)
i) Find out how far from the center of the planet is the planet-moon center of mass?
ii) Is the planet-moon center of mass below or above the surface of the planet?
iii) By what distance?