Hello, X. Please see [this](http://meta.math.stackexchange.com/questions/1803/how-to-ask-a-homework-question) post about how to ask for help with homework. Also, excellent advice on how to ask a good question in general can be found [here](http://meta.math.stackexchange.com/questions/9959/how-to-ask-a-good-question/9960).