A planar electromagnetic wave is propagating through a point P. At that location the magnetic field is pointing in the positive z direction, and the...

A planar electromagnetic wave is propagating through a point P. At that location the magnetic field is pointing in the positive z direction, and the electric field of the wave is E = - (0.075V/m) j. What is the Poynting vector at the point P at that instant (magnitude and direction)? Please show work and explain.