A) Write a short essay (50-words or more) that explains the concept of the PCMH and the role of the medical assistant in this health care delivery model. (If your major is PHN, RN or another role you may answer the question from that point-of-view). Cite and list any references used in this essay. Showcase your writing skills with clear wording and correct spelling and punctuation. (B) Write a short essay (50-words or more) that explains the difference between the terms managed care, referral, prior authorization, and precertification regarding insurance plan requirements with an example provided for each. Cite and list any references used in this essay. Showcase your writing skills with clear wording and correct spelling and punctuation. (C) Explain the concept of coordination of benefits (COB) and provide an example. Cite and list any references used in this essay. Showcase your writing skills with clear wording and correct spelling and punctuation.