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Suppose a given user view contains information about employees and projects. suppose further each employee has a unique employeenum and each project has a unique projectnum. explain how you would implement the relationship between employees and projects in each of the following scenarios:
a. many employees can work on a given project, but each employee can work on only a single project.
b. an employee can work on many projects, but each project has a unique employee assigned to it.
c. an employee can work on many projects, and a project can be worked on by many employees.

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