For the aperture shown in Figure 6-4(a) in the text and shown below, assuming it is mounted on an infinite PEC (perfectly electrically conducting) ground plane, with an electric field distribution in the aperture given by: Ea = a 10 v/m and dimensions a = 8) and b = 12x where -a/2 s y s a/2 and -b/2 s z's b/2 (a) (10 points) Form the most practical, exact or approximate (when necessary to solve the problem) equivalent currents Js and Ms. (b) (15 points) Find the far-zone electric and magnetic fields. Do not leave your answers in terms of variables "a" and "b" ... substitute the given values for "a" and "b". dy dz' (a)