We don't really need any recordings of any kind whatever. Don't sweat it; it was your idea, remember?
re: the homework, if you help them it defeats the purpose since this is not assigned for the same reasons as school homework. That's so you do more learning than the teacher has time to help you with. Mine is more to teach you programmer-style problem solving which I literally can't teach you in a lecture; if you don't scratch your head for a full day or figure it out on your own, you shouldn't even bother working on it. It's not like I'm going to flunk you for not getting it. Understanding the answer without getting it on your own is better than nothing, but if that were as good as making you do it then I'd have just told you during class. Worst-case scenario, I will tell you at class time tomorrow.
Remember, your target is 2 lines of code (ending with a semicolon each) inside your function.