Year CDMA G$4$ Wi$-$Fi $0$$ $7$$ $13$$ $20110111826\mathrm{.}5263234\mathrm{.}52020$ a$.$ Calculate the profitability index for each investment. $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$ b$.$ Calculate the NPV for each investment. $($