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SERPSE$1011\mathrm{.}1\mathrm{.}0$P$\mathrm{.}004.$

The figure below shows forces acting at various points on a metal rod. The angles $=50,=33,=21.$ The length $l=3\mathrm{.}8m.$ Find the net torque $($in $N*m)$ on the rod about the following axes.

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$($i$)$

$($a$)$ an axis through $O$ perpendicular to the page

magnitude $N*m$

direction $--$Select$-$

$($b$)$ an axis through $C$ perpendicular to the page

magnitude $N*m$

direction $---$Select$--$

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