Your client has sought for your recommendation on which of the following 500-ton chillers to be implemented in the new facility based on the simple payback period consideration. The economic data is given below. Efficiency Chiller Cost Installation Cost Electricity Cost Maintenance Cost Estimated Life Chiller A 0.60 kW/ton $250,000.00 $20,000.00 $0.10/kWh $12,000.00 20 years Chiller B 0.65 kW/ton $220,000.00 $20,000.00 $0.10/kWh $10,000.00 20 years Additional information: An annual energy analysis for this office building application shows that the required ton-hours over the year will be 2,100,000. The lifecycle is expected to be 20 years. a) Recommend the appropriate system based on your simple payback period analysis. b) Comment on the analysis method and propose alternative methods where applicable. c) Where sustainability is of concern of the client, is the above recommendation justified?