I have to evaluate the given surface integrals $\displaystyle \iint_ s 3{y}^{2 }z d\sigma$ where S is the portion of the cylinder $\displaystyle {x}^{2 } +{y}^{2 } =1 $ between the planes z = 0 and z = 1, and on the positive x side of the yz-plane

First of all i think i need to find n

Which is $\displaystyle \frac{2xi + 2yj}{4 }$ I think.

Now i'm not sure on my next step.