Solutions should be based on free body diagrams. Present every solution step and its relevant reasoning clearly. Show your positive sign conventions.

If you feel you need to have any additional information, make any reasonable assumption and state it clearly.

$={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{Mmdx}{EI}+{\displaystyle \underset{?}{\overset{?}{}}}\frac{NnL}{EA}$

Q$1.$ Find the rotation at the point B using the Unit Dummy Load Method. EI is constant for all members. Consider only the bending deformations $($i$.$e$.,$ no axial deformation contributions taken into account$).$

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