17. Find the surface area of the part of the plane z = 16 -4x - 8y in the first octant. A. 4 B. 8 C. 36 D. 16V5 E. 7218. Let S be the part of the plane x = y + z that lies inside the cylinder y + 2 = 4. Calculate ISs F . n dS for F(x, y, z) = (y' + 23, 7y, -7y) with S oriented by the normal that points in the positive +x direction. 16TT A. 3 B. -87 C. 87 D. 3 E. 167