stiffness matrix you formed above:

$D=\left[\begin{array}{c}-0\mathrm{.}0002521\\ 0\mathrm{.}00015584\\ -0\mathrm{.}01023\\ -0\mathrm{.}00029106\end{array}\right]$

You do not have to solve for the joint displacements. The joint displacements are provided as a means of checking of your work.

$7.$ Based on the joint displacements shown above, sketch the deflected shape of the beam. Your deflected shape need not be a work of art drawn to precise scale, but it should capture the essence of the joint displacements and beam deflection $($I will show how to draw a deflected shape on Wednesday$).$