What does he ultimately determine to be beyond doubt, and how does he attempt to prove this?

Instructions:
Please write a 2-3 page essay answering all parts of the following question. Feel free to use material and ideas from Chapter 5. However, if you choose to use any direct quotes from the chapter, or any other outside sources, then please remember to properly cite that material using MLA format. The use of any outside material without citation will be considered plagiarism and will result in a 0 for the assignment.
Prompt:
In his Meditations, Descartes undergoes a process of philosophical doubt to see if he there is anything that he can know with absolute certainty. What types of knowledge does Descartes doubt and why? What does he ultimately determine to be beyond doubt, and how does he attempt to prove this? Do you think Descartes is correct in his claim that there is something that can be known with absolute certainty? Why or why not?