Chemistry Equilibrium Help Please!?

Perhaps you are new to the way this system works. No one wants to do all of your homework for you. We'll be glad to help you when you get stuck on something. Like the first question. When you introduce a catalyst, the system comes to equilibrium quicker, but it does not change the value of Keq, nor does it change the position of the equilibrium. You'll need to actually work on the rest of these yourself. Then if you get really stuck on one or two questions, come back for some help.