In addition, you might want to explain your own efforts to solve the problems and where specifically you might be stuck at. From my experience reading forums, many people are hesitant to do other people's homework for them. If you explain what you have done so far, and where exactly you need help at, people are more than willing to help you through the problems. If you simply post the problem, people tend to think that you are trying to use them to do your homework. So go into a bit more detail and I think you will be happy with the help you get.