Less rated post

Hello, I have a website for german learning where I use only three possible ratings “Low difficulty post”, “Medium difficulty post” and “High difficulty post”

I am using the following code to show the High difficulty posts rated (top rated post with three stars) in a page:

<?php global $rwp; echo $rwp->GetTopRated(); ?>
<?php comments_template( ”, true ); ?>

It works perfectly, but i would need also in other page the rated Medium difficulty posts ( rated with two stars ) and Low difficulty post ( rated with one star ).

Is there any code similar to the one above to make this?

Thank you very much for your help

https://ww.wp.xz.cn/plugins/rating-widget/