Item 3.3.5.b.
Negation: The door is closed and the light is on.
Converse: If the light is off then the door is closed.
Contrapositive: If the light is on then the door is open.
Negation: The door is closed and the light is on.
Converse: If the light is off then the door is closed.
Contrapositive: If the light is on then the door is open.