David,
I will attempt to answer your questions. Hopefully, I should be able to sort out your situations. First of all, you should find your answers under TDA #'s 59: No Disclosure & 60 Exposing Cards....
It is highly unethical for any player to expose or reveal the contents of their holding. Tournament poker will call for a penalty that will begin the next hand. Verbally stating the contents of a hand is also a violation. As always, the severity of punishment might be determined by the experience of the player, or the history of a seasoned player...deliberate, or accidental?
Other consideration should be given to the number of players and when the infraction occurs. I hope this helps.