Need Help In Getting Started

[Double A]

In my statics class we are studying Rigid body equilibrium and when it got to 3D I get a little lost. Below are some homework questions I'm having a hard time starting. I get the free body diagrams but don't know where to go from there. I find that there are more unknowns than I have equations for.

I have provided links for the reactions that happen at certain types of connections. I also apologize for the bad scanning job on a couple of the images.

Reactions:
Table 1 (http://herograw.com/reactions1.JPG)
Table 2 (http://herograw.com/reactions2.JPG)

Questions:
Question 1 (http://herograw.com/5-80.JPG)
Question 2 (http://herograw.com/5-84.JPG)
Question 3 (http://herograw.com/5-96.JPG)

I appreciate any help. I need to finish this assignment asap.

[NateTG]

Are you remembering to account for Torque?

[Double A]

I am accounting for moments (tourque). The 6 equations that I have to use are:

1) Force Equations:
-\Sigma F x =0
-\Sigma F y =0
-\Sigma F z =0

2) Moment Equations
-\Sigma M x =0
-\Sigma M y =0
-\Sigma M z =0