The electric field phasor of a uniform plane wave is given by

The electric field phasor of a uniform plane wave is given by E = y10ej0.2z (V/m). If the phase velocity of the wave is 1.5 x 108 m/s and the relative permeability of the medium is Âľr = 2 4, find
(a) The wavelength,
(b) The frequency f of the wave,
(c) The relative permittivity of the medium, and (d) the magnetic field H (z, t)