Answer to Car Dealership problem
  1. customer, sales person, model, car, used, new
  2. yes
  3. yes
  4. 0
  5. no
  6. yes
  7. 0
  8. yes
  9. 0
  10. 10: One for each entity type, one for each ternary (3-way) relationship, one for talks, and one for test drive.
  11. 10: One for each table.
  12. test drive, talks, purchase, sell

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