Mario Brothers, a game manufacturer, has a new idea for an adventure game. It can market the game as a traditional board game or as an interactive CD-ROM, but not both. Consider the following cash flows of the two mutually exclusive projects for Mario Brothers. Assume the discount rate for Mario Brothers is 8 percent. Year Board Game CD-ROM 0 –$ 1,250 –$ 2,800 1 700 1,800 2 1,000 1,580 3 220 850 a. What is the payback period for each project? (Do not round intermediate calculations and round your final answers to 2 decimal places (e.g., 32.16).) Payback period Board game years CD-ROM years b. What is the NPV for each project? (Do not round intermediate calculations and round your final answers to 2 decimal places (e.g., 32.16).) NPV Board game CD-ROM c. What is the IRR for each project? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places (e.g., 32.16).) IRR Board game CD-ROM d. What is the incremental IRR? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16).) Incremental IRR.