3.Two parallel conducting plates(conductivity σco) are separated by an air gap shown in the following figure. In this air gap the electric field intensity and the magnetic field intensity are given by E= a,Ecos(at-ẞz) E Ĥ = a₁ cos(@t-ẞz) no where E, ẞ,70 and are constants. Find (1)the surface charge density everywhere in these two conductors. (2) the surface current density everywhere in these two conductors.