You have just received a windfall from an investment you made in a friend's business. She will be paying you $ 22 comma 671 at the end of this year, $ 45 comma 342 at the end of next year, and $ 68 comma 013 at the end of the year after that (three years from today). The interest rate is 3.4 % per year. a. What is the present value of your windfall? b. What is the future value of your windfall in three years (on the date of the last payment)?