Assertion (A) : The torque about the point $3\overline{\mathrm{i}}-\overline{\mathrm{j}}+3\overline{\mathrm{k}}$ of a force represented by $4\overline{\mathrm{i}}+2\overline{\mathrm{j}}+\overline{\mathrm{k}}$ through the point

$5\overline{\mathrm{i}}+2\overline{\mathrm{j}}+4\overline{\mathrm{k}} \mathrm{is} \overline{\mathrm{i}}+2\overline{\mathrm{j}}-8\overline{\mathrm{k}}$

Reason (R) : The torque of a force F about a point P is $\overline{\mathrm{r}}\times \overline{\mathrm{F}} \mathrm{where} \overline{\mathrm{r}}$ is the vector from the point P to any point $\overline{a}$ on the line of action of $\overline{\mathrm{F}}$

Which of the following is correct ?