you have two mutually exclusive projects: project L-and Project S. Both projects have 3-year lives. Here are the projects' net cash flows (in thousands of dollars): Project L Project S -100 -100 80 20 70 50 Depreciation, salvage values, net working capital requirements, and tax effects are all included in these cash flows. Both projects have risk characteristics that are similar to the firm's average project. Assume the company's WACC is 7%. (a) (10%) Calculate each project's NPV and IRR. (b) ( 10%) Calculate each project's payback period. (c) (4%) Calculate the crossover rate. (d) (4%) which project should be accepted? Explain