Stuck on the enclosed question.

I have done the first part, taken moments about A, found P to be $\displaystyle 2g cos 30$, or 17.0N to 3sf. I am taking $\displaystyle g$ as 9.8N btw.

What I can't do is the second part, find the magnitude of R. I know that there are reactions at R, horizontal and verticle, I am just having problems resolving them and then working out.

Any help would be greatly appreciated

Craig