Compute \(\iint_{\mathcal{S}} \mathbf{F} \cdot d \mathbf{S}\) for the given oriented surface.

\(\mathbf{F}=\langle 0,3, xangle\), part of sphere \(x^{2}+y^{2}+z^{2}=9\), where \(x \geq 0, y \geq 0, z \geq 0\), outward-pointing normal