A plane wave is incident normally upon a lossless medium that begins at z = 0 and has a total thickness of d that is backed with a perfect electric conductor (located at z = d). In Medium 1, characterized by material properties ϵ1 and µ1, the incident plane wave is given by Ei(z) = ˆxEi0e −jβ1z . (1) Given that Medium 2 between 0 < z < d is characterized by ϵ2 and µ2, determine the following quantities. (a) The reflected field Er(z) in Medium 1. (b) The total field E1(z) in Medium 1. (c) The total field E2(z) in Medium 2. (d) The time-average Poynting vector Savg,1 in Medium 1. (e) The time-average Poynting vector Savg,2 in Medium 2. Note: The order of questions is just to organize everything in a uniform manner after you have solved the problem. To determine the answer to (a), you will need to first solve for all of the fields in all of the regions.