Write the expression for the electric field intensity of a sinusoidally time-varying uniform plane wave propagating in free space and having the following characteristics:
(a) f = 100 MHz;
(b) direction of propagation is the + z-direction; and
(c) polarization is right circular with the electric field in the z = 0 plane at t = 0 having an x-component equal to E0 and a y-component equal to 0.75E0.