Please answer all questions, just give me True OR False. I'm begging you.

21. Appellate courts routinely retry cases by bringing in the witnesses to testify a second time. 22. A litigant is not required to respond to requests for discovery. 23. In a case where a party seeks damages for a personal injury, the opposing party may require the party seeking damages to submit to a medical examination by a physician of the opposing party's choice. 24. A defendant can waive the defense that a court lacks personal jurisdiction. 25. Actions by a court that lacks subject matter jurisdiction are void