Question $1(50$P$)$ Beam OC shown in the figure iselastic BD with joints and pinned ends at B It is supported by a bar. F$=10$ to point C A force of kN was applied. OC beamElasticity Modulus $207$ GPa $($steel$)$ and its cross section It is $40$mmx$40$mm$.$ BD elastic bar Elasticity Modulus $69$ GPa $($aluminum$)$ and its cross section $78\mathrm{.}54$mm$2$ is$.$ N$,$ m$,$ m$^2$ in solution, m$^4,$Pa$,($N$/$m$2)$ using units;

$($a$)(10$P$)$ We combine the finite element components of the problem,

$($b$)(15$P$)$ Obtain the global stiffness matrix,

$($c$)(10$P$)$ Write the load vector and boundary conditions,

$($d$)(15$P$)$ deflection $($amount of collapse$)$ at point C calculate,

$($e$)($ Calculate the displacement at point C$($amount of deflection$),)$

$($f$)(10$P$)$ Axial stress occurring in element BD Calculate. Is it safe?

$($please solve using finite elements method$)$