Yes, I would say all of those are coaching. Your job is to enforce the rules; if a player is in the lane for 3 seconds you call the violation -- but to warn them in advance that they better get out would be coaching.
I'm am not a certified basketball official, so maybe one of them could correct me. But this is a general rule in sports officiating -- you don't coach the players, you simply enforce the rules. The only exception I can think of is if play is getting too rough you might tell both team (or preferably both coaches) that they need to calm down. That's part of a dialogue to help things go more smoothly, and it's different because you are making a fairly general comment for both teams -- not a specific piece of advice to a single player.