Show me the steps to solve $5.$ From point $($A$)$ though point $($D$)$ sketch the influence lines for: a$)$ bending moment over

support $($B$)$ and b$)$ shear force immediately right of support $($B$).$ Using the slope$-$

deflection method or moment$-$distribution method, analyze the structure and calculate

and label the ordinates of both influence lines at the centre line of the structure $-$ the

centre of span $($B$)-($C$).$ The three members have the relative EI values shown.