1a. Suppose you plan to save $8,000 at the end of each coming year for the next 22 years from now for retirement. The interest rate is 9%. How much will you have 22 years from now?

answer: 502,986.71

1b. Given that you will have $502986.71 saved on the day you retire, how much will you be able to spend each year starting at the end of the first year of retirement, if you want to spend in perpetuity?

answer: 45,268.80

1c. Given that you will have $502986.71 saved on the day you retire, how much can you spend each year if you want to use up the money in 17 years?

1c please