ethan worked as a salesperson for a pharmaceutical company. for the past year he missed every sales quota and stretch goal originally set at the beginning of the year. even though his boss worked with him and sent him to receive additional training, ethan improved only slightly. in addition, ethan was not a team player and often upset other employees. his boss has decided to let him go and is now considering what type of termination to use. which of the following describes a mutual-agreement termination?