If a particle at position vec$(r)=(4\mathrm{.}5m)hat(i)$ experiences a force vec$(F)=(6\mathrm{.}0N)hat(i)-(2\mathrm{.}0N)hat(j),$ what is the torque on this particle about the origin?

vec$()=(-27Nm)hat(k)$

vec$()=(-9\mathrm{.}0Nm)hat(k)$

vec$()=(+27Nm)hat(i)-(9\mathrm{.}0Nm)hat(j)$

vec$()=(+9\mathrm{.}0Nm)hat(k)$

vec$()=(+27Nm)hat(k)$