At the very end of wagner's series of operas the ring of nibelung, brunnhilde takes the golden ring form the finger of the dead siegfried and throws it into the rhine, where it sinks to the bottom of the river. assuming that the ring is small enough compared to the depth of the river to be treated as a point and that depth of the rhine where the ring goes in is 11.2 m, what is the area of the largest circle at the surface of the water over which light from the ring could escape from the water?