Identify the incorrect statement(s).
1
A candidate key is minimal set of one or more attributes that, taken collectively, allows us to uniquely identify any entity in the entity set.
2
A candidate key for which no proper subset is also a candidate key is called a super key.
3
A super key is a set of one or more attributes that, taken collectively, allows us to uniquely identify any entity in the entity set.
4
A super key for which no proper subset is also a super key is called a candidate key.