Discuss why a claim may be rejected and possible ways to prevent a claim from being rejected.

For this unit assignment, please respond to the following key activities related to billing and reimbursements.1. Briefly describe the reimbursement methodologies.  2. Select a payment system, discuss your selected payment system, and identify its role related to billing and reimbursement.  3. Discuss why a claim may be rejected and possible ways to prevent a claim from being rejected.     The purpose of this assignment is to allow you to recognize the policies and procedures to comply with the changing regulations among various payment systems for healthcare services such as Medicare, Medicaid, and managed care.