There you go. Now you can look them up and learn about them on your own.
why don't you hand it on a plate? giving them answers they should know for theirselves just makes them believe we'll answer their homework questions for them.
a little effort can be expected from him, since he's the one who wants to pass his course. your answer may have helped him now, but that'll just come to bite him in the ass later on... part of being in college is learning for yourself, not having everything spelled out for you. just by thinking for (less than) three minutes, he should have find out what kind of errors there can be, especially since they're propably mentioned in his notes.
about to learn them on his own: he won't. all he has to do is give an explanation, so that's all he'll do. if he wanted to do more than that, he would surely be capable of finding everything he needed without creating this thread