Assume a planet is a uniform sphere of radius R that (somehow) has a narrowradial tunnel through its center. Also assume we can position an apple anywherealong the tunnel or outside the sphere. Let Fp be the magnitude of the gravitationalforce on the apple when it is located at the planet's surface. How far from thesurface (what multiple of R) is there a point where the magnitude of thegravitational force on the apple is 0.5 FR if we move the apple (a) away from theplanet and (b) into the tunnel?(a) Number:Units:(b) Number:Units:

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