One of two alternatives will be selected to reduce flood damage in a rural community in central Arizona .The estimates associated with each alternative are available. Use B/C analysis at

a discount rate of 8%per year over a 20-year study period to determine which alternative should be selected. For analysis purposes only, assume the flood damage (in terms of dollars) would be prevented in years 3, 9, and 18of the study period (3 times). Use present worth estimations to solve this problem.