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Britney Javelin Company is considering two investments, both of which cost $28,000. The cash flows are as follows: Use Appendix B and AppendixD. a. Calculate the payback period for project A and project B. (Round the final answers to 2 decimal places.) b-1. Calculate the NPV for project A and project B. Assume a cost of capital of 9 percent. (Round "PV Factor" to 3 decimal places. Round the intermediate and final answers to the nearest whole dollar.) b-2. Which of the two projects should be chosen based on the NPV method? Project B Project A Both c. Should a firm normally have more confidence in answer derived based on NPV method or Payback method? NPV method Pay back method