You do not have to retreat anywhere.
In places 1, 3 & 4 the laws presumes you to be in fear of great bodily harm or death if the intruder forcibly and unlawfully enters those places and can use deadly force.
In publicas long as you are "reasonably" in fear of great bodily harm or death you could use deadly force.
You can see the TN self defense (castle doctrine) here T.C.A. 39-11-611
DISCLAIMER: I am not a lawyer or work in any capacity in the legal field the above is my lay interpretation of the law and is offered as such and should not be taken as direct advise for any course of action!