Kant analyzes three propositions that are implicit in our common understanding

In Sections 1 and 2 of the Grounding, Kant analyzes three propositions that are implicit in our common understanding of morality and then argues that those propositions can only be justified if the primary principle of morality has the form of a categorical imperative. In this homework, explain how the main steps in this argument work. Construct a dialogue map of these questions answers and supporting reasons. Second, in one concise, typed, ds, page, explain how the parts of this argument fit together.