A loop of wire in the xy plane is bent into a figure-eight shape as shown, and placed in a time-varying but spatially uniform magnetic field described by the equation B=(0.30t2+2.8t-5.0) mT out of the page. Model each half of the figure eight as a circle. The radius of the upper half is 3.00 cm, and of the lower half is 5.00 cm. If the wire has a resistance per unit length of 2.00 /m, find (a) the magnitude and (b) the direction of the induced current as a function of time