Let \( S=\{(x,y)\in \mathbb{R}\times \mathbb{R}: \ge 0,\, y\ge 0,\, y^{2}\le 4x,\, y^{2}\le 12-2x \text{ and } 3y+\sqrt{8}\,x\le 5\sqrt{8}\} \). If the are of the region \( S \) is \( \alpha \sqrt{2} \), then \( \alpha \) is equal to:
\( \frac{17}{2} \)
\( \frac{17}{3} \)
\( \frac{17}{4} \)
\( \frac{17}{5} \)