millions of dollars): a. What is the regular payback period for each of the projects? Round your answers to two decimal places. Project A: years Project B : years b. What is the discounted payback period for each of the projects? Do not round intermediate calculations. Round your answers to two decimal places. Project A: years Project B : years c. If the two projects are independent and the cost of capital is 10%, which project or projects should the firm undertake? The firm should undertake d. If the two projects are mutually exclusive and the cost of capital is 5%, which project should the firm undertake? The firm should undertake e. If the two projects are mutually exclusive and the cost of capital is 15%, which project should the firm undertake? The firm should undertake f. What is the crossover rate? Round your answer to two decimal places. Project A: % Project B: %