Short Essay on Descartes and Locke on Our Knowledge of the World

What is the difference between Descartes and Locke on how we know things in the world?

(Break the question down into these parts):

How do Descartes and Locke differ on what we know about things in the world?
What are their arguments?
What objections can be raised against each view?
How would they reply to those objections?
What difference would it make to adopt each view?