You have just received a windfall from an investment you made in a friend's business. He will be paying you $20,449

at the end of this year, $40,898 at the end of the following year, and $61,347 at the end of the year after that (three years from today). The interest rate is 6.9% per year.

a. What is the present value of your windfall? (Round to the nearest dollar.)

b. What is the future value of your windfall in three years (on the date of the last payment)?