Chapter 1.3, Problem 4ES

Let $G=\{\text{ -}2,0,2)$ and $H=\{4,6,8)$ and define a relation V from G to H as follows: For every $\left(x,y\right)\in G\times H$, $\left(x,y\right)\in V$ means that $\frac{x-y}{4}$ is an integer.
a. Is 2 V 6? Is (-2) V (8)? Is $\left(0,6\right)\in V$? Is $\left(2,4\right)\in V$?
b. Write V as a set of ordered pairs.
c. Write the domain and co-domain of V.
d. Draw an arrow diagram for V.