The equation of the hyperbola that has a center at $(6,2)$, a focus at $(1 , 2)$, and a vertex at $(9 , 2 )$, is $$\frac{(x-C)^2}{A^2}-\frac{(y-D)^2}{B^2}=1$$ where
$A =$
$B =$
$C =$
$D =$