Suppose S is parametrization t, S sin t, s) for 0

Suppose S is parametrized by r(s, t) = (s cos t, s sin t, s) for 0 s 1 and 0s ts27t. Find the normal N(S, t) = X h! for S, (b.) Find the Cartesian equation for S and the Cartesian equation for the tangent plane to S at r(l, 70.