Question $2$:

For the shown beams construct the influence lines for: Reactions at the supports; moment at point $1($M$1)$; moment at point $2($M$2)$; shear at point $2($Q$2)$; and shear at point $3($Q$3).$ Use the constructed influence lines to calculate the design values $(\backslash (\backslash$max $\backslash )$ and min $)$ for the reactions, M$1,$ M$2,$ Q$2$ and Q$3$ due to the shown dead load and a moving live load of $\backslash (20\backslash$mathrm$\{$kN$\}/\backslash$mathrm$\{$m$\}\backslash )$ with unlimited length. $($where$,\backslash (\backslash$mathrm$\{$M$\}=\backslash )$ bending moment, and $\backslash (\backslash$mathrm$\{$Q$\}=\backslash )$ Shear force$)$