"3,4,[2| In certain region the electric lield is given by D = 2p(z + 1) cos $ a p(z + 1) sin $ a4 + 02 cos $ az U/m? (a) Find the charge density_ (b) Calculate the total charge enclosed by the volume 0 < p < 2; 0 < $ < t/2; <2 < 4 (c) Contirm Gauss'$ law by finding the net flux through the surface of' the volume in"