I need help solving the following question about electromagnetic forces.

On an innite at metal surface, a uniform surface current K 3' (current per unit width) is owing in the +9: direction. Above the surface, a conductor ring with radius a is held with its normal x direction in the z-direction. The total resistance of the ring is R. p a) Assume that the permeability of the metal equals the K permeability of free space (no). Find the direction and magnitude of the magnetic eld above the metal surface. (Assume that 52 x 9 = 2.) b) If the surface current is gradually shut off as K (t) = Ko(1 t/r), where 0 s t S 1', nd the direction and magnitude of the induced electric eld in the ring. c) Find the total heat that is dissipated on the ring in the entire shut-off process. (An any moment, em f 2 .) R d) If the surface current is shut off at a faster rate, would the total heat dissipated on the ring in the process increase or decrease? electric power P =