Copier is a partner of X-Files Firm. It is a firm which carry on a business in leasing photocopy machines. There is a restriction in the partnership agreement stipulating that a partner is not permitted to be involved in the sale of papers. Without the knowledge of other partners Copier sold photocopy papers of various brands to AZ publishing Co. The papers are found to be not of quality and AZ publishing Co. wishes to sue the firm. Advice AZ Publishing Co. as to their rights