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 1 $ 23,000 $ 20,000 2 10,000 9,000 3 10,000 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.) a-2. Which of the two projects should be chosen based on the payback method