Question $3$: $(7$ marks$)$

a$)$ Show the free body diagram of each link on the figure. Not that weights of the $()$

b$)$ If the horizontal force $P=50N,$ what torque $T$ must be applied to link $2$ to maintain static equilibrium?

$AB=3\mathrm{.}5m,BC=CE=6m,AE=2m,DE=7m$

Show the FBDs below