\vec{AC}=\vec{CD}=\vec{DB}\\
\vec{CD}=3\vec{\imath}-2\vec{\jmath}-2\vec{k}=\vec{AC}=\vec{DB}\\
$dakle $
2-x_a=3, -y_a=-2, 2-z_a=-2,$ pa je $A=(-1,2,4)\\
$sli\v{c}no $ B=(8,-4,-2)