THelp with this problem step by step

The $2$ inch by $2$ inch by $12ft$ spar buoy from Fig. P$2\mathrm{.}113$ has $5lbm$ of steel attached

and has gone aground on a rock. If the rock exerts no moments on the spar,

$($compute the angle of inclination $,)$

plus determine the submerged length of spar?

Note: The $W$ of the wood is already computed and is equal to $12\mathrm{.}8lbf.$