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 $11$ percent. Year Board Game CD$-$ROM $0$ $ $1,550,7601,300280-$$ $3,4002,100,1,6401,150$ 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$.,32\mathrm{.}16).)$ Payback period Board game CD$-$ROM years 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$.,32\mathrm{.}16).)$ 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$.,32\mathrm{.}16).)$ 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$.,32\mathrm{.}16).)$ Incremental IRR