As for the question on homework #2 (“Why is this interesting?”), I have posted a revision that includes the following elaboration:

Why is this interesting? Here are some things you might comment on: None of those forms in the table are actually infinitives—the infinitive has a distinct form, and there were essentially zero. How might this relate to the ATOM model? To the truncation model? Given what we see in the adult data (last line) to what extent are the children’s productions governed by what they are hearing?

This is a pretty free-form question. Feel free to add any additional thoughts you have. The basic idea of this exercise is to look at a small amount of data from a language we haven’t talked about (Swahili) and see how it bears on the models of first language acquisition (from 2-3 years) that we’ve discussed so far. It is probably relatively obvious how it relates to the ATOM model, but it is worth thinking about how difficult it is to understand from the perspective of the other available models of acquisition we’ve looked at.