A beetle sits at the rim of a turntable that

A beetle sits at the rim of a turntable that is at rest but is free to rotate about a vertical axis. Suppose the beetle now begins to walk around the perimeter of the turntable. Does the beetle move forward, backward, or does it remain in the same location relative to the ground? Answer for two different cases,

(a) The turntable is much more massive than the beetle

(b) The turntable is massless.