Draw the analytical model: number the supports, the elements, specify the local axes of the elements, identify the unknowns.

Determine the stiffness matrix of the structure, [S]. Express all cases as a function of EI.

Determine the charge vectors, {P} and {Pf}

Use Excel or similar to determine the displacement vector, {d}.

Please make the steps, they are really important.

Next, a photo appears where I list the bars and nodes, it is as it should be.

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