List the step$-$by$-$step approach to flexibility method.

Calculate the forces in a truss as shown. $AE$ is constant for all elements. Joints

$1$ and $3$ are pinned and joint $4$ is restrained in the horizontal direction, but free

to move vertically.

Figure $2-21$ An indeterminate truss

Calculate the reaction forces for the frame shown in figure $2-22.$ Take EI as

constant in all the members of the frame.

Calculate the shear force and bending moment diagrams of the beam shown

below. Take $EI$ as constant throughout.