Power of Court to modify award. The Court may by order modify or correct an award-
a where it appears that a part of, the award is upon a matter not referred to arbitration and such part can be separated from the other part and does not affect the decision on the matter referred or
b where the award is imperfect in form, or contains any obvious error which can be amended without affecting such decision or
c where the award contains a clerical mistake or an error arising from an accidental slip or omission.