You were very close, missing the joining condition between registration and courses . You have an odd mix of implicit and explicit INNER JOIN s. Your join into courses should be another INNER JOIN which is joined through registration to students .
You mentioned courses in your query but you didn't join it to anything.
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.