Section 10. The arbitrators or umpire acting under a submission shall, unless a different intention is expressed therein,

10. The arbitrators or umpire acting under a submission shall, unless a different intention is expressed therein,— (a) have power to administer oaths to the parties and witnesses appearing; (b) have power to state a special case for the opinion of the Court on any question of law involved; and (c) have power to correct in an award any clerical mistake or error arising from any accidental slip or omission.