FIGURE 4.10 A WEAK ENTITY IN AN ERD Chen Model M EMPLOYEE has DEPENDENT (0,N) (1,1) EMP NUM EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB EMP_HIREDATE EMP NUM DEP NUM DEP_FNAME DEP_DOB Crow's Foot Model EMPLOYEE DEPENDENT PK EMP NUM has ht (1,1) EMP_LNAME EMPFNAME EMP_INITIAL EMP DOB EMP_HIREDATE PK,FK1 EMPNUM OPK DEP NUM (0,0) DEP_FNAME DEP_DOB If EMPLOYEE were optional to DEPENDENT (instead of being mandatory as shown in the above ERDiagram), the relationship between EMPLOYEE and DEPENDENT can still be implemented as a strong relationship. O False True