Relations Questions

Let $X$ be the set of all persons living in a city. Persons $x,y\in X$ are said to be related as $x<y$ if $y$ is at least $5$ years older than $x$. Which one of the following is correct?

Let $m\in \mathbb{Z}$ and consider the relation $R_m$ defined by $a{R}_{m}b$ if and only if $a\equiv b(\mathrm{mod}m)$. Then $R_m$ is:

If $A=\{1,2,3\}$ and $R$ is a relation defined on $A$ such that $R=\{(1,1),(1,2),(2,3),(2,2),(3,3),(3,1)\}$. Then the relation $R$ is: