First it is very clear that this is a graded work.

It is generally the policy to do these for you.

Second, you simply posted the whole assignment without showing any effort whatsoever. Moreover, many who help here refuse to have to download attachements.

I see that you are required to use LaTeX. You can use it on this forum.

On [tex]\mathbb{R},~xRy~\Leftrightarrow~x|y [/tex] gives

Click on the “go advanced” tab. On the toolbar you will see clicking on that give the LaTeX wraps, [tex] [/tex]. The code goes between them.