I think you are right, and it looks like a mistake. And maybe it's just late at night, but some of the assignments to 'c' look wrong too. We went over the te

I think you are right, and it looks like a mistake. And maybe it's just late at night, but some of the assignments to 'c' look wrong too. We went over the text many times, but the figures got much less review. I'll send a correction to Daniel tomorrow. It looks like you signed up just to post this --- thanks, and welcome to HN! Send me email (click on my username) if you'd like credit in the Changelog.