U8N WXD

I'm going to hold off on review since it doesn't look like this PR is done yet (i.e. all the tests are failing, looks like there are tests that still...

Lets hold off on this for a few days while the core maintainers discuss

@lkbhitesh07 I see that you have failing [lint checks](https://github.com/oppia/oppia/runs/8287415621?check_suite_focus=true), which should have run on your local machine when you pushed your changes. Did these checks run locally? (I want to...

Assigned @ashutoshc8101 since it looks like they need to take the next step. @karenbanci please make sure to assign people when you want them to take action, since most people...

@anthonyqzhu done!

@bhavukJain done

Sorry about that @bhavukJain. I've fixed it. Thanks for noticing!

@DiptoChakrabarty you might need to install coverage with `pip install coverage`

@chiragbaid7 I just assigned you to the first one for now. Once you open a PR for that, I'm happy to assign you another task

@dhruvshrivastava done!