Fia. P$6\mathrm{.}99$ and P$6\mathrm{.}100$

Fig. P$6\mathrm{.}98$

$6\mathrm{.}99$ Determine the force in members $EF,FG,$ and GI of the truss

shown.

$6\mathrm{.}100$ Determine the force in members $CE,CD,$ and $CB$ of the truss

shown.