The value of ∯ (4xî - 2y2j + z2k).n̂ds where S is bounded by x2 + y2 = 4, Z = 0 and Z  = 3 is

1
84 π
2
80 π
3
 (4 - 4r sin θ + 2z) rdr dθ dz where x = r cos θ, y = r sin θ 
4
 (4 - 4r sin θ + 2z) rdr dθ  dz where x = r cos θ, y = r sin θ  

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