$4.$ Problem $7\mathrm{.}2\mathrm{.}56.($Hint: assume member BE is a two$-$force member$)$

$7\mathrm{.}2\mathrm{.}56.$ The exercise frame in E$7\mathrm{.}2\mathrm{.}56$ is bolted to the floor at $\backslash ($ A $\backslash )$ and pinned at $\backslash ($ B $\backslash ).$ Determine the loads acting at $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ if the frame is in equilibrium.

E$7\mathrm{.}2\mathrm{.}56$