In $($Figure $1),P_1=1\mathrm{.}8$ kip and $P_2=2$ kip.

Figure

Determine the force in member AB$,$ AI$,$ BC$,$ BI$,$ CD$,$ CF$,$ CG$,$ CI$,$ DE$,$ DF$,$ EF$,$ FG$,$ GH$,$ GI$,$ and HI