What is the main focus of the book On Death and Dying and what are the five stages of grief that are discussed in the book?

What is the main focus of the book On Death and Dying and what are the five stages of grief that are discussed in the book?
This is a specialized Philosophy course that’s main focus is: “On Death and Dying.” This paper will need to be comprehensive in terms of detailing the Influence Socrates had on Plato’s Philosophy. I have attached the course syllabus which has the details of the Final Paper, as well as a few notes and readings on Socrate’s and Plato. I also have the textbook that is required for this course, so I can always scan the Plato readings from the textbook which highlights Plato & Western Civilization.