Compare and contrast Plato and Aristotle on the nature of form and matter. How does Aristotle reconcile Platonic dualism in his view of the unification of essences within material reality?

Cogito ergo sum

1.Compare and contrast Plato and Aristotle on the nature of form and matter. How does Aristotle reconcile Platonic dualism in his view of the unification of essences within material reality? (Use primary source quotations from both philosophers.)
2.Explain Descartes method in his Meditations on First Philosophy. How does does his doubt lead to the certainty of “cogito ergo sum.” How did this realization lead to the mind-body problem in modern philosophy? (Use primary source quotations in your response in addition to secondary sources.)

http://en.wikipedia.org/wiki/Four_causes
http://pespmc1.vub.ac.be/METAPHI.html

http://en.wikipedia.org/wiki/Gottfried_Wilhelm_Leibniz
http://pespmc1.vub.ac.be/EPISTEMI.html
https://mycourses.spcollege.edu/d2l/le/content/307704/viewContent/12559871/View