申論題

Correctly number each of your answers to indicate which question is answered.

(Q) Let S be the surface described by z = x²+ with 4x²+ y² ≤ 1 oriented with normals with positive k-components. Let F(x,y,z) = xi - yj + k. Evaluate F.dS. Answer:__ (18)__ Also, evaluated.S. Answer: __(19)__.