What are the main differences between the flat, regressive, and progressive tax plans?

What are the main differences between the flat, regressive, and progressive tax plans?
Under which plan would you pay the most in taxes? Under which plan would you pay the least in taxes? Which tax system would benefit you the most? Explain your response and refer to your specific career. Do you think the plan that benefits you most is the most fair for everyone? Explain your response. Imagine you marry and your spouse earns $50,000 per year. You will be filing your taxes together. Does this change your opinion of the proposed tax plans? Explain your response.