Question $3(1$ point$)$

Determine the moment $($in N$.$m$)$ produced by the force vec$(F)$ about the segment $AB$ of the pipe assembly. Consider vec$(F)=-42$hat$(i)+36$hat$(j)+27$widehat$(k)N,=50$ degrees, and $\frac{?}{\text{b}\text{a}\text{r}}(AB)=3\mathrm{.}0m.$