A force vec$(F)=\{190i,170j,90k\}N$ acts at the end of a pipe structure $($note that the orientation of the force

on the figure is simply schematic$).$ Determine the magnitude of the moment developed by force vec$(F)$ about the

x$,$ y$,$ and $z$ axes and the moment developed by vec$(F)$ about the axis OA$.$

The dimensions of the pipe strecture are as follows: $L_1=0\mathrm{.}7m,L_2=0\mathrm{.}8m,$ and $L_3=0\mathrm{.}5m.$

The magnitudes of the moments are:

Moment about x$-$axis:

$N^{**}m$

Moment about y$-$axis:

$N^{**}m$

Moment about z$-$axis:

$N^{**}m$

Determine the magnitude of the moment developed by force vec$(F)$ about the axis OA$.$