Problem $1-5[2]$ Use the

direct stiffness method to

determine determine $($a$)$

$E=210$GPa

$A=4{10}^{-4}{m}^2$

$=25mm$

global stiffness matrix, $($b$)$

nodal displacement, $($c$)$

element forces and $($d$)$ support reaction forces. Compare the solution with an Abaqus FE solution.