Given the following (normalized) relational model (primary keys are underlined, foreign keys are in italics).

EMPLOYEE(SSN, ENAME, EADDRESS, SEX, DATE_OF_BIRTH, SUPERVISOR, DNR)

• SUPERVISOR: foreign key, refers to SSN in EMPLOYEE, NULL value allowed
• DNR: foreign key, refers to DNR in DEPARTMENT, NULL value not allowed

DEPARTMENT(DNR, DNAME, DLOCATION, MGNR)

• MGNR: foreign key, refers to SSN in EMPLOYEE, NULL value not allowed

PROJECT(PNR, PNAME, PDURATION, DNR)

• DNR: foreign key, refers to DNR in DEPARTMENT, NULL value not allowed)

WORKS_ON(SSN, PNR,, HOURS)

• SSN: foreign key, refers to SSN in EMPLOYEE, NULL value not allowed
• PNR: foreign key, refers to PNR in PROJECT, NULL value not allowed

Which statement is NOT CORRECT?

		According to the model, an employee should always work on projects assigned to his/her department.
		According to the model, an employee can work in multiple departments.
		According to the model, an employee can manage multiple departments.
		According to the model, a supervisor cannot supervise more than one employee.