Here is a question which is a homework question. This is problem 3.23 on page 97 of Hastie et al., Elements of Statistical Learning, 2nd. ed. (5th printing). There are several problems in my opinion:
- The poster does not mention that this is homework.
- The poster rephrases the original problem by omitting some key definitions, but the questions he asks are from the original problem.
This might be honest mistake, but I do feel somehow cheated, so I already downvoted the question. What I want to ask is whether I should edit the question to reflect that this a homework and to give the references. Also what is the policy for such type of questions?