$***$Please solve using a unit vector based approach$***$

A $600-$N vector extends down the negative z$-$axis from $A$ at the origin, which is connected

to three cables: cable $AB$ extending into the positive $xy-$plane, $30$ from the $y-$axis; cable

$AC$ extending along the negative $x-$axis; and cable $AD$ extending $2$ m from the positive x $-$

axis, $1$ m from the negative $y-$axis, and $2$ m above the xy$-$plane.