(1) Motions for new trials shall be made as follows:
(a) For causes mentioned in 25-11-102 (1), the motion shall be made on affidavits or on the minutes of the court.
(b) For causes mentioned in subsection (2), (3), or (4) of 25-11-102, the motion shall be made only on affidavits.
(c) For causes mentioned in subsection (5), (6), or (7) of 25-11-102, the motion shall be made only on the minutes of the court.
(2) The official stenographic reports of the trial may be referred to as a part of the minutes of the court.