4) relegation and PO final series, there is an very old failure for those three games series about the homecourt - because at least for me it sounds like they threated the same way then the finals, in terms who got the homecourt advantage.
The 8th seed in each conference is automatically demoted, and the 6th-ranked team from each conference competes with the 7th-ranked team from the other conference in a best-of-three relegation series. The fifth-ranked teams are safe, but they dont get a shot at the championship, either.
For the single-match eliminations, the team with the higher standing is given the home-court advantage. When there is a best-of-three series, the team with the higher standing has the home-court for the first match and for the tie-breaker (if a third game is necessary), and the lower-ranked team has the home-court for the second match.