Calculate the vertical reaction at support A when the horizontal force, $\backslash (\backslash$mathrm$\{$X$\}=8\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=19\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note: Assume that forces pointing to the right are positive$)$ Calculate the vertical reaction at support B when the horizontal force, $\backslash (\backslash$mathrm$\{$X$\}=6\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash ($ Y$=13\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note: Assume that forces pointing to the right are positive$)$ Calculate by hand the forces in member AB using the Resolution at Joints method when the horizontal force, $\backslash (\backslash$mathrm$\{$X$\}=6\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash ($ Y$=18\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note assume tension forces are positive$)$ Calculate by hand the forces in member CE using the Resolution at Joints method when the horizontal force, X $\backslash (=6\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=12\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note assume tension forces are positive$)$ Calculate by hand the force in member ED using the Resolution at Joints method when the horizontal force, X $\backslash (=4\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=18\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note assume tension forces are positive$)$