What surfaces are given by the following parameterizations? (That is, what are the images of the following functions over the given domains?) (a) P(s, t) = si + tj + (6 – 2t - s)Ë with 8,t € (0,1). (b) S(0,0) = 3 cos(0) sin($)i + 3 sin(0) sin((); + 3 cos(6)k with 0 € [0,2"] and $ € 0,1 (c) C(0,t) = (cos(() + 1)T + (sin(0) + 1); + tk with 0 c [0,21] and t€ (0,2).