Sec. 16. Trial by jury is an inviolate right and shall be secured to all, but in a civil cause three-fourths of the jury may render a verdict. A jury may be waived in a criminal cause by the consent of both parties expressed in open court by the defendant and the defendant's counsel. In a civil cause a jury may be waived by the consent of the parties expressed as prescribed by statute.
In civil causes the jury shall consist of 12 persons or a lesser number agreed on by the parties in open court. In civil causes * * * other than causes within the appellate jurisdiction of the court of appeal the Legislature may provide that the jury shall consist of eight persons or a lesser number agreed on by the parties in open court.
In criminal actions in which a felony is charged, the jury shall consist of 12 persons. In criminal actions in which a misdemeanor is charged, the jury shall consist of 12 persons or a lesser number agreed on by the parties in open court.