10 UMLClass 330 30 160 90 STUDENT -- s# ID1 first-name last-name dob bg=#dddddd UMLClass 100 190 310 60 POSTGRADUATE-STUDENT -- s# ID1 FK1 thesis bg=#dddddd UMLClass 430 190 270 60 UNDERGRADUATE-STUDENT -- s# ID1 FK1 project bg=#dddddd