Consider the following projects: Cash Flows (S) -1,400 2,800 3,500 1,400 1,400 1,400 1,400 1,000 1,400 1,400 4,400 1.400 1,400 a. If the opportunity cost of capital is 10%, which project(s) have a positive NPV? Positive NPV projectis) Project A Project B ProjectC Projects A and B Projects A and C O Projects B and C Projects A, B, and C No project b. Calculate the payback period for each project: (Round your answers to 2 decimal places. If a project never pays back, enter "O".) Project A Project B Project C year(s) year(s) year(s) C. Which project(s) would a firm using the payback rule accept if the cutoff period were three years? Project(s) accepted d. Calculate the discounted payback for each project. (Do not round intermediate calculations. Round your answers to 2 decimal places. If a project never pays back, enter "O".) (Click to select) * Projoct A Project B Project C year(s) years) year(s)