Identify each quadric surface as an ellipsoid, hyperboloid of one sheet, hyperboloid of( two sheets, elliptic cone, elliptic paraboloid, or hyperbolic paraboloid and sketch it, showing at least two traces. (=-2)2 (a) (v-1)2 r= + 4 (b) 2' - y? = 2x. (c) 9x2 + y2 + 472 - 18x + 2y + 16z = 10