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Question 1 20 pts A public agency is considering four mutually exclusive alternatives in addition, the do-nothing alternative is feasible). Use the benefit to cost ratio method to determine which of the alternatives is preferable, given an interest rate of 12% per year. Alternative Initial Cost ($K) Annual Benefit ($K) Life (years) A 100 30 10 B 120 35 5 250 50 15 D 175 38 6