Consider each of the electric- and magnetic-field orientations given next. In each case,...

Consider each of the electric- and magnetic-field orientations given next. In each case, what is the direction of propagation of the wave? (a) in the +x-direction, in the +y-direction; (b) in the -y-direction, in the +x-direction; (c) in the +z-direction, in the -x-direction; (d) in the +y-direction, in the -z-direction.