The beam below has rollers at A and $B$ and rests on a ledge at $D$ with a coefficient of friction of $0\mathrm{.}9.$ There is also an internal pin or hinge at point C$.$ Calculate the reactions at A$,$ B$,$ and the normal force at D$.$ Can the surface generate enough friction to keep the beam from sliding off the ledge at $D?(15pts$

Reaction at point $A=q,$

Reaction at point $B=q,$

Normal Force at $D=q,$

Does beam slide? $(\frac{Y}{N})q,$