Which of the following would be improper in an attorney retainer agreement? A provision in which the client agreed to waive any and all malpractice claims. A provision providing for destruction of a client file after a period of time. All of the above. A provision limiting the scope of the attorney's representation in which the attorney specifically limited the representation to the trial court, and not any appeal to the appellate court, following disposition of the case. A provision providing for a sliding scale client fee depending on the outcome of a civil litigation matter