please explain a, b and c

(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 B End of Year $ 15,000 A $10,000 10,000 10,000 10,000 10,000 $ 10,000 10,000 45,000 10,000 8 10,000 9 10,000 10 10,000 15,000 (Click on the icon in order to copy its contents into a spreadsheet.) a. What is the present value of investment A at an annual discount rate of 19 percent? $ (Round to the nearest cent.) 4567A W N - 2 3