Question: Consider the relational database below. What are the appropriate primary keys for each table/relation? Explain your answer and explain what assumptions you had to make

Consider the relational database below. What are the appropriate primary keys for each table/relation? Explain your answer and explain what assumptions you had to make to identify the primary key.

employee (person_name, street_address, city, state, zip, phone1, fax, email)

employment (person_name, company_name, salary)

company (company_name, city, state, zip, phone, fax)

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