68. Mario and Luigi are plumbers. They begin operating as a partnership under the business name “Super Mario Bros. Plumbing & Heating”. Luigi goes to a trade show and is dazzled by a supplier, Bowser's Supplies. He signs a deal with Bowser indicating that Super Mario Bros. Plumbing and Heating will purchase supplies exclusively from Bowser for five years. Mario is furious when he finds out and wants no part of that contract. Is Mario required to honour the contract? Why or why not?