here's my homework

Suppose F = ( -y, -x- z,y- x) And S is that part of the plane z=8-y that lies in the cylinder x2 + y2 = 25 with boundary C C: r(t) = (5 cost, 5 sint, 8 - 5 sint) 0 S t s 2n Evaluate the line integral in Stoke's Theorem to find the value of the surface integral ( V X E ) . n ds S Assume the C has counterclockwise orientation and S has a consistent orientation. 8TT (V28- 6) 0 50TV3 50T