3. [2 marks] Consider the surface integral I dS, S where S is the part of the surface z = 212 + y that lies above the triangle in the ry-plane with vertices (0, 0), (3,3) and (0, 3). What is the correct expression of this surface integral? A) [ zi+ 1612 + dy di dy (B) I(1+ 161 + 4y') di dy (c) . zV/1+ 412 + 2y' di dy (D) T. J. 1 + 1612 + 4y2 dr dy (E) none of (A) (D)