8-15 Consider four mutually exclusive and a do-nothing alternatives, each having an 10-year useful life: First cost Uniform annual 125 120 100 125 $1000 $800 $600 $500 benefit Salvage value 750 500 250 0 (a) Construct a choice table for interest rates from 0% to 100%. (b) If the minimum attractive rate of return is 8% which alternative should be selected