Problem $1(100\%)$

For the shown truss, use the stiffness method to determine the nodal displacements at nodes $1$ and $2,$ reactions at nodes $3$ and $4,$ and the axial force in truss member $1,2,$ and $5.$

Use $E=30{10}^6$ psi and $A=2$ in ${?}^2$ for all elements.

Use MATLAB to solve for the nodal displacement.