Contrast the various positions taken by René Descartes and Thomas Hobbes on the mind-body problem. How did they help psychology move forward?

Contrast the various positions taken by René Descartes and Thomas Hobbes on the mind-body problem. How did they help psychology move forward?
1. Who is Descartes/ what did he do
2. Who is Hobbes/ what did he do
3. What was the Descartes and Hobbes vie on the mind-body problem
4. How did their work influence others