Please calculate the NPV and payback period for the following two projects and choose the suitable project. The business use 10% discount rate. Project A: Year 0 -1000 Project B: Year 0 -1000 Year 1 200 Year 1 500 Year 2 300 Year 2 400 Year 3 400 Year 3 300 Year 4 500 Year 4. 200