What inspection items should I fix?

[Dana Holland]

I'm selling a property for the first time.  We are under contract with a buyer, and they had their inspection done.  They are asking for some things that in my opinion are really petty.  I'm wondering of the following items, should we have any of it fixed?  (We have agreed to fix some items like a few drywall patches, windows that wouldn't latch, replace burnt out lights).

These are the questionable items:

-Have HVAC unit serviced and have a P-trap installed.  (HVAC unit is 3 years old and runs perfectly fine).

-Apply firewall separation to the attic pull down ladder (metal sheathing or fire resistant drywall).

- Replace flexible type dryer vent with smooth metal type (supposedly the flexible one is a fire hazard?).

-Replace outlets in garage with GFCI outlets.

- Have pool contractor service pool vacuum that is reported to be running sluggishly (pool bottom looks clean whenever I'm there).

- Have chimney swept due to creosote build up.

Thanks for any input.  I want to be reasonable with the buyers but don't want to bend over backwards to accommodate every little item they want fixed.