for b, plan 3 is wrong. please help with b,c,d,e

Future value. You are a new employee with the Metro Daily Planot. The Planet offers three different retirement plans. Plan 1 starts the first day of work and puts $1,200 away in your retirement account at the end of every year for 40 years. Plan 2 starts aftor 10 years and puts away $2,200 every year for 30 years. Plan 3 starts after 20 years and puts away $4,200 every year for the last 20 years of employment. AII three plans guarantee an annual growth rate of 12%. a. Which plan should you choose if you plan to work at the Planet for 40 years? b. Which plan should you choose if you plan to work at the Planet for only the next 30 years? c. Which plan should you choose if you plan to work at the Planet for only the next 20 years? d. Which plan should you choose if you plan to work at the Planet for only the next 10 years