3) Consider the magnet falling through the copper portion of the tube, with its north pole pointing up as in the figure above. At the location of the magnet indicated, consider currents induced in three "rings" of copper (imagine individual slices of the tube), at positions above (a), in the middle of (b) and below (c) the falling magnet. (i) In the centre of each ring in the top-view picture below, write whether the magnitude of magnetic flux is increasing (A|:| > 0), decreasing (A|$:|