$($Maximum $10$ points$)$ Consider the frame sown an agure $3($right$).$ The joint at $A$ is a roller while

that at $C$ is a pin. The joint $B$ is rigid. Answer the following:

$($a$)(5$ points$)$ Draw the bending moment diagram for the frame.

$($b$)(5$ points$)$ Draw the shear force diagram for the frame.