4. much should you set aside to generate $100,000 annually forever if interest How is assumed to be 9%? Answer Using present worth analysis, choose the best alternative from the information below, assuming interest is 12%, and a 15 year useful life. 5. Uniform Net Salvage Annual Benefit Value Alternative $25,000 $12,000 $32,000 $6,000 $ 5,000 $9,000 $60,000 $50,000 $45,000 NPWa NPWc Best Alter._