At one instant, forceF $=4\mathrm{.}0$ j$$Nacts on a $0\mathrm{.}25$ kg object that has position vector r $=(2\mathrm{.}0$ i $2\mathrm{.}0$ k $)$mand veloc ity vectorv $=(5\mathrm{.}0$ i $+5\mathrm{.}0$ k $)$m$/$s$.$ About the origin and in unit$-$ vector notation, what are $($a$)$ the object$$s angular momentum and $($b$)$ the torque acting on the object?