A closed surface with dimensions a = b = 0.400 m and c = 0.600 m is located as in Figure P24.66. The left edge of the closed surface is located at position x = a. The electric field throughout the region is non-uniform and given by E = (3.0 + 2.0×2) i N/C, where x is in meters. Calculate the net electric flux leaving the closed surface. What net charge is enclosed by the surface?