Discussion question on Aristotle

Aristotle argues that the most important form of happinessconsists neither in momentary episodes of pleasure nor in long series of suchmoments,but rather in the happiness one can take in old age in reflecting backon a life well-lived.

Please answer the following question:

•What, according to Aristotle, constitutes a lifewell-lived, and how does his conception of this relate to his conception ofvirtue and his ideal of virtuous action that avoids both "excess" and"deficiency" but rather that realizes "a mean"?