Powers of arbitrator

The arbitrators or umpire acting under a submission shall, unless the submission expresses a contrary intention, have power, (a) to administer oaths to or take the affirmations of the parties and witnesses appearing; (b) to state an award as to the whole or part thereof in the form of a special case for the opinion of the court; and (c) to correct in an award any clerical mistake or error arising from any accidental slip or omission.