If you ask a question in a reply, be sure to change the subject line to indicate that you're asking a question. On the other hand, making it clear that you are able and willing to help in the process of developing the solution is a very good start. It's sometimes difficult for A to decide whether to respond with "animal," "vegetable," or "mineral," so here are some examples and other thoughts that might provide help to both A and Q. But this isn't really true. However, asking a question in a reply is a dubious practice in itself, because it will only be seen by those who are watching this thread.