A city is planning to invest in potential projects with the estimated cash flows below. 

First Cost AOC, per Year Alternative Annual Increase in Operating Cost, per Year Salvage Value Life, Years Effective interest rate: i( )= i) alternative C has life time of infinity ii) Alternative C has 10 years life time C D $-4200 $-2300 $-700 $-350 $-40 $800 $30 5