Explain why Descartes needs God (Med. 3 and 5) to ground I am, I exist and the security of knowledge. Do you agree that an `I’ cannot be the source of its own existence, needing God to account for it? Explain why or why not

Explain why Descartes needs God (Med. 3 and 5) to ground I am, I exist and the security of knowledge. Do you agree that an `I’ cannot be the source of its own existence, needing God to account for it? Explain why or why not