A uniform plane wave of angular frequency is incident on a plane interface at z = 0 between two lossless dielectric media. Medium 1 (z < 0) has permittivity 1 = 20 and medium 2 (z > 0) has permittivity 2 = 30. The incident electric field in medium 1 is given by the vector phasor Ei = ax az3 2 E0 ej1(x3 z)/2, 1 = 01, where E0 is a positive constant with unit V/m. Determine the vector phasor of the transmitted electric field Et