Problem $4.$ The beam supports a distributed live load of $\backslash (2\backslash$mathrm$\{$kN$\}/\backslash$mathrm$\{$m$\}\backslash )$ and single concentrated load of $6$ kN $.$ The dead load is $\backslash (4\backslash$mathrm$\{$kN$\}/\backslash$mathrm$\{$m$\}\backslash ).$ Determine $($a$)$ the maximum vertical positive reaction at $\backslash ($ C $\backslash ),($b$)$ the maximum negative moment at $\backslash ($ A $\backslash ).$ Draw the influence lines.