Let $A=\{-1,2,5,8\}$, $B=\{0,1,3,6,7\}$ and $R$ be the relation is one less than form $A$ to $B$. Then,
1) Find $R$ as a set of ordered pairs
2) Find domain and range of $R$.
3) Find $R^{-1}$ as a set of ordered pairs.
4) Find the domain and range of $R^{-1}$.
My Attempt:
First I calculated the Cartesian Product of $A$ and $B$ as
$$A\times B=\{(-1,0),(-1,1),(-1,3),(-1,6),(-1,7),(2,0),(2,1),(2,3),(2,6),(2,7),(5,0),(5,1),(5,3),(5,6),(5,7),(8,0),(8,1),(8,3),(8,6),(8,7)\}$$.
Now, I could not understand the condition given for the relation.