(Related to Checkpoint 6.6) (Present value of annuities and complex cash flows) You are given three investment alternatives to analyze. The cash flows from these three investments are as follows: Investment Alternatives B End of Year 1 2 $20,000 A $20,000 20,000 20,000 20,000 20,000 3 4 5 100,000 6 7 $20,000 20,000 20,000 20,000 20,000 8 9 a. What is the present value of investment A at an annual discount rate of 21 percent