With Respect to the Concepts of "Purpose" and "Mission," Which

With respect to the concepts of "purpose" and "mission," which of the following is correct?
A purpose is a statement of how an organization will behave with respect its stakeholders.
A mission is only relevant for not-for-profit organizations, while a purpose is relevant only for profit-making businesses.
A purpose is an organization's reason for being.
There is really no difference between a purpose and a mission.
A purpose is only relevant for not-for-profit organizations, while a mission is relevant only for profit-making businesses.