Why not have a go at these questions? 
Replies to a question might include:
- A section you are stuck on, for which you would like some help from the community
- Some thoughts you may have on how to approach it
- A section you think you may have a solved and you want to share with others (potentially use spoiler sintax here (
[spoiler]contents go here[/spoiler]) so others don’t accidentally see an answer too early