Question: A professor is required to teach at least one class and students must take at least one class. A professor may teach one or more

A professor is required to teach at least one class and students must take at least one class.

A professor may teach one or more classes but a student must take one or more classes. A class must be taught by one professor but a class may or may not have students.

A professor must teach one or more classes and a class must be taught by one professor. A student may take one or more classes but a class must have one or more students.

A professor may teach one or more classes and a student may take one or more classes. A class must be taught by one professor and a class must have at least one student.

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