Let $n$  be a positive integer. if  R is a relation defined on Z as $xRy\iff x-y$ is divisible by n,  then R is

If $x-y$  is divisible $n$  then $-\left(y-x\right)$  it is divisible by $n$  it is symmetric

$x-y$  is divisible by $n,y-z$   is divisible  by $n$  then $x-z$  is divisible by $n$  it is transitive