interviewing techniques

Keep in mind these questions are from the stand point of a counselor or Phsycologist. Please answer accordingly. I will send payment as soon as I get paid.. I have been out of work since my surgery and am awaiting short term disability payment.
What are some of the similarities and differences between motivational interviewing techniques used in a counseling setting and persuasive techniques used in a business sales setting? What are the ethical considerations in each setting? Be sure to cite as appropriate, the online course, the textbook, and other credible, scholarly sources to substantiate the points you are making. Apply APA standards for writing and citations to your work.