5. A surface has first fundamental form: ds? = Edu? + 2Fdudv + Gdv2 where: if I = u? + v2 1, AE = 2? + 02 1, AF = 20, AG = a + 202 Compute the Gaussian curvature. (A) -1-2 (B) -12 (C) (2u2 + 2v2 1)-2 (D) 0 (E) -1 5. A surface has first fundamental form: ds? = Edu? + 2Fdudv + Gdv2 where: if I = u? + v2 1, AE = 2? + 02 1, AF = 20, AG = a + 202 Compute the Gaussian curvature. (A) -1-2 (B) -12 (C) (2u2 + 2v2 1)-2 (D) 0 (E) -1