Question: For the depicted ER model, select all statements that must hold! Id HoursSpent Id M N Salary Employee WorksOn Project Title FirstName LastName Budget Select

For the depicted ER model, select all statements that must hold!

For the depicted ER model, select all statements that must hold! Id HoursSpent Id M N Salary Employee WorksOn Project Title FirstName LastName Budget Select one or more alternatives: The ID for an employee must match the ID for some project. An employee can work on several projects. There can be employees who work on no projects. Every employee has a unique combination of first and last name. There can be projects on which no employees work

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