Mario Brothers, a game manufacturer, has a new idea for an adventure game. It can either market the game as a traditional board game or as a PC game, but not both. Consider the following cash flows of the two mutually exclusive projects. Assume the discount rate for both projects is $8$ percent.

Year Board Game PC

$0$$ $1,750$$ $3,800$

$18002,300$

$21,5001,680$

$33201,350$

a$.$ What is the payback period for each project? b$.$ What is the NPV for each project? c$.$ What is the IRR for each project? d$.$ What is the incremental IRR?