Calculate the vertical reaction at support B when the horizontal force, $\backslash (\backslash$mathrm$\{$X$\}=5\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=14\backslash$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 $\backslash ($ A B $\backslash )$ using the Resolution at Joints method when the horizontal force, $\backslash ($ X$=4\backslash$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 forces in member CE using the Resolution at Joints method when the horizontal force, X $\backslash (=5\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=11\backslash$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 $\backslash (=7\backslash$mathrm$\{$kN$\}\backslash )$ and the vertical force, $\backslash (\backslash$mathrm$\{$Y$\}=10\backslash$mathrm$\{$kN$\}\backslash )$ are applied to the truss. $($Note assume tension forces are positive$)$