## Need Help In Getting Started

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
Table 2

Questions:
Question 1
Question 2
Question 3

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

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 Recognitions: Homework Help Science Advisor Are you remembering to account for Torque?
 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 -$$\Sigma M x =0$$ -$$\Sigma M y =0$$ -$$\Sigma M z =0$$