Knowledge questions, the knowledge framework and key concepts

Which four elements make up the TOK knowledge framework?

Which of these is a knowledge question rather than a first order question?

Which feature does every good knowledge question have?

A question asks what problems an area of knowledge tries to solve and where its limits lie. Which element of the knowledge framework is this?

Which question belongs to the methods and tools element of the knowledge framework?

Which question belongs to the ethics element of the knowledge framework?