I finally told one of them off earlier. I should have done it earlier, but the way she requested me for assistance in finishing some work was really rude and appropriate.
When I told her off for the way she spoke, her response was, 'fine, I'd do it myself!', which she did. I had my own work to do, and if she wants me to help her, she'd have to sound 'apologetic' and 'humble' about it, rather than being rude about it.
This is definitely the beginning of a good thing.
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