Develop a RISA$-2$D model to determine the external reactions and internal forces of the truss

shown. Show all your work. Verify your computer$-$generated results by solving for all internal

forces and reaction.

$[$Member Properties: $E=29{10}^6$;$I=100\mathrm{.}0i{n}^4$;$A=10\mathrm{.}0i{n}^2]$