A utility company provides stand by power using diesel powered generators. An alternative has been developed using natural gas but the gas will not be available for 3 years. By switching to gas they will save 13,000 per year for 10 years starting three years from today. At an interest rate of 6% what is the annual worth of the savings over the next 12 years O 10,157 O 12,789 O 14,879 O 22,656