The paradigm for plurals was not given in this lesson so I’m a bit baffled here.
Sorry if this is not the right place to ask but, for which previous lessons are there paradigms? And where exactly?
I believe they mean the "Tips & Notes" section you see when you scroll down from the list of lessons in each section on the web version. This topic does not have any because the course contributors haven't gotten to it yet. I imagine they will eventually add these and we should see some basic rules for how plurals are formed.