Gaussian surface Z An electric field given by E = ai - b(y? + c) j pierces the Gaussian cube of the figure above, where the cube has side length d. NOTE: Express your answers in terms of the variables given. (a) What is the electric flux through the top face? Ptop (b) What is the electric flux through the bottom face? bottom =(c) What is the electric flux through the left face? Pleft = (d) What is the electric flux through the back face? Pback = (e) What is the net elctric flux through the cube? Pnet