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Consider the following projects: Assume that the projects are mutually exclusive and that the opportunity cost of capital is 12% a. Caiculate the profitability index for each project. (Do not round intermediate calculotions. Round your answers to 2 decimal places.) Answer is complete but not entirely correct. b-1. Calculate the profitability -index using the incremental cash flows. (Do not round intermediate calculations. Round your answer to 2 decimal pleces.)