1. a) Find all points on the surface parameterized by r=t, y=s', z=ts, t>0, s

1. a) Find all points on the surface parameterized by ys2, z=ts, t > O, s < O, where the tangent plane is horizontal (i.e. parallel to the Ty-plane).131 b) Find the area of the surface z = + e [0, 11. c) Evaluate + y2)dS, where S is parameterized by (2uv,u2 e2,u2 + e2) , r(u, and < 1.