Engineering Economics & Environmental Questions (5points) (ACCE-SLO#18) Your Company plans to purchase a 15-ton A/C to replace an existing unit. It costs $15,000 to install. it is a high-efficiency equipment, which meets the requirement of SCE's rebate program of $150 per ton. The expected yearly electric energy saving is $4,000 with 4% escalation rate. The estimated yearly repair/maintenance fee is $1,000 with 2% escalation rate; Assume 5% discount rate, please find out: al, Simple Pay back bi. Life-Cycle cost by showing accumulative present values for the next 5 years. Utility savings from the above unit will help to reduce pollutants liberated to the atmosphere. If the electric rate is $0.12/KWH of year 1, how many pounds of CO2 in year 1 will be reduced due to the electric savings? (Assume electric generated by oil)