Question $1(12$ points$)$ The foot lever is pin$-$supported at $D$ and connected to a short link $BC$ as

shown in Fig. Q$1.$ Assuming that the force $P$ is given, and the weight of the members is negligible,

$($a$).(3$ points$)$ Is the short link $BC$ a two$-$force member or a three$-$force member?

$($b$).(4$ points$)$ Draw the free body diagram of short link $BC.$

$($d$).(5$ points$)$ Without calculation, determine the orientation of the reaction force at $D$ on Fig. Q$1$

graphically.