What should someone in their 20s do to start planning and preparing for retirement?

there are two assignments. Assignment 1:What should someone in their 20s do to start planning and preparing for retirement?What should someone in their 30s do to start planning and preparing for retirement?What should someone in their 40s do to start planning and preparing for retirement?What should someone in their 50s do to start planning and preparing for retirement?Assignment 2.Pick two different types of retirement plans (examples: 401k, 403b, Roth IRA, IRA, tax-sheltered annuity, etc.). Investigate the benefits and drawbacks of these retirement plans, and provide a summary of a) the definition of the plan b) the process for contributing to the plan c) the tax implications of the plan, and d) the pros and cons of the plan.the writer may use this website: https://www.irs.gov/retirement-plans/retirement-plans-frequently-asked-questions-faqs