Section 5B. The probate court having jurisdiction of the estate of a decedent, or of any trust or person affected by sections five and five A, and by this section, or any of them, shall have jurisdiction to hear and determine all questions arising under said sections, and to make apportionments and prorations, determine the amounts thereof and of reimbursements, contributions and other payments therein provided for, and by order or decree to direct the making of any such payments, and issue execution therefor, and to make such other determinations, orders and decrees as may be required under said sections, subject to appeal as in other cases.