1. What set is represented by the relation ≤ ◦ ≥, where ≤ and ≥ are relations on R? 2. What set is represented by the relation successor ◦ predecessor, where successor = {hn, n + 1i : n ∈ Z} and...

1. What set is represented by the relation ≤ ◦ ≥, where ≤ and ≥ are relations on R?

2. What set is represented by the relation successor ◦ predecessor, where successor = {hn, n + 1i : n ∈ Z} and predecessor = {hn, n − 1i : n ∈ Z}?