Show how you got your answer for each problem! 1. Find the future value of the following cash flow streams; the interest rate is 5 percent per year, compounded annually: a. $800 is invested at the beginning of each year for the next 6 years (the first payment occurs right now (time zero) and the last payment occurs at the end of year 5). The proceeds are withdrawn six years from now. b. $800 is invested each year, starting today and continuing through year 6, when the proceeds are withdrawn. c. $800 is invested each year, beginning one year from now and continuing through year 5. The proceeds are withdrawn in year 6