$2.$ Draw the influence line for $($a$)$ the vertical reaction at A and B$,($b$)$ the shear at C$,$ and $($c$)$ the moment at C$.3.$ Draw the influence line for $($a$)$ the vertical reaction at A and B$,($b$)$ the shear just to right of rocker at A$,$ and $($c$)$ the moment at C$.$