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OCR: Buys Customer Product Wholesale Retail Retums Attributes: Customer Type Attributes: (Retail or Wholesale) Product ID Customer Name Product Name Customer Address FIGURE 1 This model contains extraneous objects: The participating entities and connectivity for the relationships Buy and Return are identi- cal, so they should be represented by the single relationship Buy and Return. Also, the subtypes Retail and Wholesale have identical attributes and relation- ships, so you should eliminate them.