Could someone please help me calculate just the Incremental IRR (d.) and explain how to do it. Thank you in advance!

Problem 5-14 Comparing Investment Criteria Wii Brothers, a game manufacturer, has a new idea for an adventure game. It can market the game either as a traditional board game or as an interactive DVD, but not both. Consider the following cash flows of the two mutually exclusive projects for the company. Assume the discount rate is 12 percent Year Board Game DVD 0 -$1,450 3,200 740 1,200 260 2,000 1,620 1,050 2 a. What is the payback period for each project? (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) Payback period Board game 1.59 years DVD 1.74 years b. What is the NPV for each project? (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) NPV 352.40 624.53 Board game DVD c. What is the IRR for each project? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) IRR Board game 27.19 % DVD 24.40 % d. What is the incremental IRR? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Incremental IRR