Let E be the set of all even negative integers greater than -20. Which of the following is considered correct notation for E?
1) E = x | x > -20
2) E = x ∈ Z | x is even and x > -20
3) E = negative integers greater than -20
4) Power set of all even negative integers greater than -20
5) E = x ∈ Z- | x is even and x > -20