AP.10-20 An average power of 1 (kW) at 10 (GHz) is to be delivered to an antenna at the TE10 mode by an air-filled rectangular copper waveguide 1 (m) long and having sides a=2.25 (cm) and b = 1.00 (cm). Find a) the attenuation constant due to conductor losses, b) the maximum values of the electric and magnetic field intensities within the waveguide, c) the maximum value of the surface current density on the conducting walls, d) the total amount of average power dissipated in the waveguide.