What Are the Correct Reactions at Points A, B, and CD in This Mechanics Problem?

[Altairs]

Simple moments ! Can't do ! Urgent

Homework Statement

Determine the reactions at the smooth collar A, the rocker B and the shortlink CD.

Homework Equations

RC = Normal reaction at smooth collar A.
RN = Normal reaction at rocker B.
RD = Normal reaction at D.
Moment at rocker B is given to be 4KN.
All distance shown in the diagram(made in paint) are in meters.

The Attempt at a Solution

The equations I made are :-
Taking moments at B...
(RCsin45*10) + (2.5cos60*3) + (4) = (RCcos45*3) + (RD*3) + (2.5sin60*6)
Forces...
RCcos45 = RD + 2.5cos60
RCsin45 + RN = 2.5sin60

The answer I get is wrong after calculating. Where does the error lie?

 

[Altairs]

Need urgent help.