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D 4(12 pts) A city is planning to invest in potential projects with the estimated cash flows below. Given that interest rate is 4.880884817% per semiannual, determine which option is preferable if options are mutually exclusive using PW analysis. Alternative First Cost $-16800 $-9200 AOC, per Year S-2800 $-1400 Annual Increase in Operating Cost, per Year $-160 Salvage Value $3200 $120 Life, Years 5 Effective interest rate:i( )- i) alternative C has life time of infinity ii) Alternative C has 10 years life time