ocr: Buys Customer Product Wholesale Retail hetums Attributes: Customer Type Attributes: (Retail or Wholesale) Producti ID Customer Name Product Name Customer Address FIGURE 1 This model contains for the extraneous relationships objects: Buy The and Return participating are entities identi- and connectivity 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.
