value 3.12 points X-treme Vitamin Company is considering two investments, both of which cost $20,000. The cash flows are as follows: Year Project A Project B 10,000 10,000 9,000 15,000 Use Appendix B for an approximate answer but calculate your final answer using the formula and financial calculator methods. a-1. Calculate the payback period for Project A and Project B. (Round your answers to 2 decimal places.) Payback Period Project A Project B year(s) year(s) a-2. Which of the two projects should be chosen based on the payback method? Project A Project B b-1. Calculate the net present value for Project A and Project B. Assume a cost of capital of 8 percent. (Do not round intermediate calculations and round your final answers to 2 decimal places.) Net Present Value Project A Project B