Poynting Vector of a planar EM wave 0.0/2.0 points (graded) In a certain region of space, the electric and magnetic fields are given by E (y,t) = - E, sin (ky+mt)i and B (y, t) = -B, sin (ky + otk, respectively. (Part a) Find the Poynting vector, Š in this region of space. Write your answer in terms of E_0 for Eo , B_0 for Bork, y, omega form, t, hati for î, hatj forġ, hatk for Ê, epsilon_0 for £o, and mu_0 for Mo as needed. Ś (t) = (Part b) The direction of wave propagation is: Oti +j It -K