QUESTION 6 Four mutually exclusive alternatives, each with a useful life of 10 years, have been presented to the city council. Using an ERR analysis and MARR - 8%, which alternative would you recommend? The "do nothing alternative is an option. Mutually Exclusive Alternatives Initial Cost $4,000 $8,200 $5,500 $3.700 Annual Benefits 800 1,500 1.000 850 ERR 11.2296 10.2396 10.17% 12.7896