I've been working through a textbook, often encountering difficulties with the exercises. On mathstackexchange, with most of them I haven't arrived yet at a satisfactory solution.
As I understand, they might be not ideally phrased, but I don't know what should be changed, or I don't see a good possibility to rewrite them. If you miss some background information, I will try to provide it.
If it would cost too much time, maybe you like to leave hints for (better/more detailed) solutions or general, short descriptions how the solution 'looks like'.
In future I'll try to write in a way that can more easily be answered. Of course nobody should feel forced to answer, in the past it seemed people sometimes feel that way, to my surprise.