A) Select the best method of construction using Return on Investment ROI (Rate of Return) method, the data of both equipment are shown the table below, B) Compare the effect of decrease in revenues of 10% on the rate of return method II (calculate the % of change in ROI) Method I Method II Initial cast (OR) C1 C2 Annual revenues R R (OR /yr) O&M annual cost 15200 16500 (OR/Y8) Salvage value 2000 1500 (OR) Useful life (Yea 8 D C1 21000 C216200 R20300