Find a unit vector that has the same direction as the given vector.

$\frac{-8i+2j-k}{(\frac{-8}{\frac{\sqrt[\phantom{2}]{?}}{69}})i+(\frac{2}{\frac{\sqrt[\phantom{2}]{?}}{69}})j+(\frac{-1}{\frac{\sqrt[\phantom{2}]{?}}{69}})k}$