Question $8$

What are the indices for the direction represented by the vector that has been drawn within a unit cell?

$\frac{1}{2},0,\frac{1}{2}$

$-1-43$

$\frac{1}{6},-\frac{2}{3},\frac{1}{2}$

$\frac{2}{3},\frac{2}{3},0$