$P_1=460(N)$

$P_2=345(N)$

$A_1=115(m{m}^2)$

$A_2=101(m{m}^2)$

$A_3=115(m{m}^2)$

$L=89(mm)$

$E=20000(\frac{N}{m}{m}^2)$

will be solve Octave or Matlab program

Create elements in the system with given nodes and write the connectivity table $3$ points

Write the displacement boundary conditions $4$ points

Write the force boundary conditions $4$ points

Calculate displacements at free nodes $3$ points

Calculate all reaction forces $3$ points

Calculate the stresses in the elements. $3$ points

Add your Octave$/$Matlab code and results $5$ points