In this subunit and the last, I've introduced a fairly large amount of material pretty quickly. We've seen the iterated function, our first example of a dynamical system. And we've seen a bunch of new vocabulary: seed, initial condition, itinerary, orbit, fixed points, stable and unstable, attracting and repelling. We've also seen time series plots and the phase line. In my experience, it takes a little bit of practice to get comfortable with these ideas. So I'll be sure to use the quizes as a chance to practice and try some of this stuff out. Again, a reminder that the quizes are not evaluated, they're not a part of your grade for the course. We don't see the scores at all. And if you have questions about the material on the quizes, you can ask on the forum. In the next subunit, I'll summarize the terms we introduced in the last two, and present some ideas a little bit more formally. You'd might want to watch that video before trying the quizes, or you might just want to jump in at the quizes right now.