$(2$ points$)$ Using the equations derived in class, calculate the muscle force $F_m,$ the reaction force through the joint, $F_j,$and angle of joint reaction force $,$ for full extension of the knee $(=90),$ partial flexion of the knee $(=45),$ and an extreme flexion of the knee $(\{$:$=30).$ Express forces $F_m$ and $F_j$ in terms of body weight $W,$and use the values below for the remaining constants. Finally, comment on how joint forces compare to body weight as a function of extension$/$flexion$.$ Is this what you expected, why or why not?

$a=0\mathrm{.}08h(whereh=$ height$)$

$b=0\mathrm{.}14h$

$c=0\mathrm{.}28h$

$=15$

$w_t=0\mathrm{.}06W$