5) In a given material with magnetic permeability / and electric permittivity e, the magnetic field is given by: B = Bre-(ax+By+yz+60); + Bye-(ax+By+yz+80) ; + B, e-(ax+By+yz+60) k a) Using one of the Maxwell's equations, find an expression for the electric field. [7 pts] b) Show that E . B = 0 and thus that the fields are perpendicular to each other. [7 pts] Note: The exponential are indeed real exponentials, not a typo. There is no claim that this is a wave, the focus of this problem is the procedure