This is going a bit too far:
Can we start with just the most interesting questions that people are really struggling with? That's what SE is for, isn't it? When I started using SO almost 10 years ago, it was a place to go when I really needed help with something.
There is also another issue I have with this series. Very soon SLesslyTall will have a higher reputation than absolutely anybody here, and will have access to moderator tools, will be able to decide what questions stay open or get closed, etc. The reason people with high reputation get high power is because they have earned it by showing that they have the capacity to ask very good questions or give very good answers. In every SE I know, asking lots of excellent questions involved having creativity or having original ideas.
When copying and pasting questions from N&C, it is actually Michael Nielsen and Isaac Chuang that made the intellectual creative effort. They were the ones creative enough to come up with good questions. If you've ever written a textbook, you will know how excruciatingly difficult it is to come up with good, creative exercises. If you've ever taught a course, you know how hard it is to come up with good educational but do-able homework exercises.
Michael Nielsen and Isaac Chuang were the ones that spent the time making these questions.
Every question I asked here was an original idea and written by myself. If you want, I can ask Ike Chuang tomorrow if he and Mike would like to set up an account where he can get reputation for people like SLesslyTall ask all the questions from his book. But otherwise, I do not think you should get free points accredited to your username for asking questions that other people came up with.
Finally, it is going to be extremely rare to hear me say this, but I don't think this particular question (Exercise 2.5) belongs here. I usually advocate including every question. It takes effort to ask a question, never delete it except in exceptional circumstances. I have read the meta post about "assuming that a question is about quantum computing" and giving the "benefit of the doubt". But this question is just a very basic math question that belongs on the Mathematics SE (in the event that someone actually struggles to get the answer themselves, which I think is impossible so it might even be considered off topic there, for not making any effort to do one's "own research" before asking the question).
I still think more than half the points for the question should go to an account in Mike or Ike's name, since they came up with the "interesting question". It doesn't take much effort, creativity, or original work to copy a question out of a book. Points for effort that goes into typing a question in LaTeX format? I don't think so... I envision that it's going to be like someone reading N&C and getting stumbled by how hard a question is, and then asking for the answer here. Why should they ever get points for that?