It is proper Netiquette to help others learn. Do answer questions.
The rule of reciprocity applies to the internet and education. Help others and others will help you.
The internet has a lot of helpful information. Many people post helpful information. Searching the internet for help in school is a great way to find answers to tough questions. Look for help online and you will find it.
Help others and they will help you because the class benefits from the success of members.