Suppose that we are given two concentric circles with radii satisfying 0 0, why does the preceding exercise imply that the points on the circle which are closest to P have polar coordinates (s, a) and (t, a), and what does this imply for the distances between P and the two circles? Note that there are several cases depending upon which of the statements 0 0, why does the preceding exercise imply that the points on the circle which are closest to P have polar coordinates (s, a) and (t, a), and what does this imply for the distances between P and the two circles? Note that there are several cases depending upon which of the statements 0