Can someone help me with this?

Let $A=\{2,4\}$ and $B=\{1,3,5\}$ and define relations $U,V,$ and $W$ from $A$ to $B$ as follows.

For every $(x,y)inAB,$

$(x,y)inU$ means that $y-x>2,$

$(x,y)inV$ means that $y-1=\frac{x}{2},$ and

$W=\{(2,5),(4,1),(2,3)\}.$

$($a$)$ Which of the following arrow diagrams could represent $U?$

$($i$)$

Which of the following arrow diagrams could represent $V?$

$($i$)$

$(1)$

Which of the following arrow diagrams could represent $W?$

$($b$)$ Indicate whether any of the relations $U,V,$ and $W$ are functions. $($Select all that apply.$)$

$U$ is a function.

$V$ is a function.

$W$ is a function.

None of the relations are functions.