Hume Questions

Here are a few questions on Hume, like I promised.

1. What are some of the arguments Hume employs in order to show that reason does not motivate the will?
2. What are some of the arguments Hume employs in order to show that moral judgments are not based on reason?
3. What are relations of ideas and what are matters of fact? How are they different? How do we come to know them? What principle distinguishes them?
4. If, as Hume argues, morality is not based on reason, can it be objective somehow, or do the arguments we've seen so far point toward a radical relativism?
5. Why can't morality be found through reason in the relationship between objects?
6. Why can't morality be found through reason in matters of fact?
7. What is the is/ought (or naturalistic) fallacy?