What is relativism (all four types), ethnocentrism, and principalism? Use an example to illustrate how each is different?

What is relativism (all four types), ethnocentrism, and principalism? Use an example to illustrate how each is different?------------------------------------------------MUST be 250 words or more. APA style and some references. This question is based on the Business Ethics class (Business Ethics. A managerial approach by Wicks, Freeman, Werhane, Martin). Thank you