Three Dimensional Geometry

$\left(\frac{1}{\sqrt{26}}, \frac{4}{\sqrt{26}}, \frac{3}{\sqrt{26}}\right)$

$\left(\frac{1}{3}, \frac{2}{3}, \frac{2}{3}\right)$

$\left(\frac{1}{\sqrt{3}}, \frac{1}{\sqrt{3}}, \frac{1}{\sqrt{3}}\right)$

$\left(\frac{-1}{6}, \frac{5}{6}, \frac{\sqrt{10}}{6}\right)$