Find the Flux of the Vector Field F Across the Surface

Multiple Choice

Find the flux of the vector field F across the surface S in the indicated direction.
-F = xi + yj + k; S is portion of the cone z = 3 between z = 3 and z = 6; direction is outward

A) 802/ 5 $\pi$
B) - 802/5
C) 1604 / 5 $\pi$
D) - 1604 / 5 $\pi$