Explain how the characteristic activity of humans, reason, related to human happiness or eudaimonia?

1.) Reading the Nicomachean Ethics book I chapter 5 what are the three prominent lives of happiness that Aristotle mentions? What objections does he provide regarding these lives?
2.) In Chapter 7 book 1 Aristotle describes the function, characteristic activity, and work (ergon) of human beings as being the reason. In your post address one of the following questions. 1) How does he argue for the human function as a reason? or 2) Explain how the characteristic activity of humans, reason, related to human happiness or eudaimonia?