I need sincere help solving.

a$)[60$ points$]$ Find the Stress and Strain in both ligaments and the force in the muscle. On Paper write out your FBD and system of equations. In Matlab solve the system. Write your Numeric final answers on paper.

b$)[10$ points$]$ What happens mechanically to the ligaments? Are they intact, permanently deformed, or destroyed? Justify your answer using answers from $1$a$)$

c$)[$Extra Credit $10$ points$]$ If the diameter of Ligament $2$ shrinks by $0\mathrm{.}5$ mm during this stretching, what is its Poisson's ratio? If Ligament $2\text{'}$s diameter is shrinking, what does that mean for the stress calculations we made in part $1$a$)?$