[Update: I have solved the problem addressed here in a different way. Rather than have you skip (12), I made the homework due a week later so we could talk about what you needed to know. So, do (12) too as part of homework 4.]
Sorry, I got ahead of myself, even more than I’d thought. Number (12) on the homework (Claudia gave Oliver mustard) requires something that we haven’t talked about, it’s buried at the end of the handout that I didn’t get through on Tuesday. So, if you can decipher what the handout means, then you could probably do it, but nevertheless, I intend to add this to homework #5 instead.
So DON’T DO (12)!
But if you figured it out and have already done it, it wasn’t time wasted, it’ll just be counted as part of homework 5.