A 60-MHz plane wave traveling in the – x-direction in dry soil with relative permittivity r = 4 has an electric field polarized along the z-direction. Assuming dry soil to be approximately lossless, and given that the magnetic field has a peak value of 10 (mA/m) and that its value was measured to be 7 (mA/m) at t =0 and x = – 0.75 m, develop complete expressions for the wave’s electric and magnetic fields.