Evaluate the surface integral orientation. 1 F-ds for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) F(x, y, z)=xy i+yzj+zxk 5 is the part of the paraboloid z-8-2-y that lies above the square 0 x 1,0 y 1, and has upward orientation