Figure 30-44a shows a wire that forms a rectangle (W ! 20 cm, H ! 30 cm) and has a resistance of 5.0 m . Its interior is split into three equal areas, with magnetic fields , / and . The fields are uniform within each region and directly out of or into the page as indicated. Figure 30-44b gives the change in the z components Bz of the three fields with time t; the vertical axis scale is set by Bs ! 4.0 mT and Bb ! %2.5Bs, and the horizontal axis scale is set by ts ! 2.0 s. What are the (a) magnitude and (b) direction of the current induced in the wire?