Final answer:
The author of the letter is most likely trying to move from an assistant manager position to a manager position, as they mention wanting to gain more experience in their current role. Richard's letter is a plea for help against a wrongful imprisonment. The question also touches on how job seekers can reassure potential employers when faced with imperfect information.
Step-by-step explanation:
The author of the letter is aiming to convince someone to quit his or her job. This is not evident in the scenario provided. Instead, based on the information, the author is seeking to move from an assistant manager position to a manager position as inferred from Jane's example. However, the subject matter related to one of the provided excerpts gives a strong indication that he is attempting to seek help against an injustice. The businessman contemplates a raise due to his hard work, but rather than pushing his manager for one, he rationalizes that hard work is its own reward. In contrast, Richard's letter clearly seeks assistance for being wrongfully imprisoned, hoping someone on the outside will help fight his and Darren's case. The last example provided is about someone looking for a job, and ways they might reassure a potential employer with imperfect information include highlighting relevant experience, providing references, and demonstrating knowledge about the company and industry.