In the figure the magnetic field in a region is vertical and was measured to have the values shown on the surface of a cylinder. Which of the following are true? The measurements imply that the box contains a current-carrying loop of wire.The measurements imply that the box contains nothing at all.The measurements imply that the box contains a bar magnet.The magnetic flux over the closed box is nonzero, which violates Gauss's Law for magnetism.The measurements are probably incorrect, since we have never yet found a magnetic monopole