A parallel-polarized (with respect to plane of incidence) 30uW-(cm)2, 1.91GHz wireless communication signal is incident on a perfect conductor surface located at y=0 at an incidence angle of 0 = 30 as shown in figure 3.56. The signal can be approximated as a uniform plane wave. k N 30 Perfect conductor At y=0 (a) Write the instantaneous expressions for E(y,z,t) and Hi(y,z,t). (b) Find Er(y,z) and Hr(y,z) of the reflected wave. (c) Find the magnitude of the total magnetic field phasor Hi(y,z) and sketch it as a function of y