How do I create a Haskell class instance including a predefined type?

Use a newtype for AdjListGraph instead of a type synonym. You can use the TypeSynonymInstances extension like it asks, but that causes problems with type inference because type synonyms don't "stick" and when they expand out they won't necessarily have the right form necessary to select the correct type class instance. Using a newtype will help you avoid a lot of headaches down the road, even if it does require wrapping and unwrapping.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.