Force $P$ is supported by two cables and a bar. Point A lies in the $yz$ plane, and

points $B$ and $C$ lie in the $xz$ plane. The compressive load that causes the bar to

buckle and the breaking strength of each cable are specified below. If factors of

safety against failure $($see the footnote of Prob. $3\mathrm{.}94)$ of $1\mathrm{.}7$ and $2\mathrm{.}0$ are to be

used for cables and bars, respectively, determine the allowable force $P$ that can

be supported