At one instant, force $=6\mathrm{.}0$ N acts on a $0\mathrm{.}80$ kg object that has position vector

$=(8\mathrm{.}08\mathrm{.}0)$ m

and velocity vector

$=(7\mathrm{.}0+7\mathrm{.}0)$ m$/$s$.$

$($Express your answers in vector form.$)$

$($a$)$ What is the angular momentum of the object about the origin?

$=$

kg $$ m$2/$s

$($b$)$ What torque acts on it$?$