Interest rate = = 11% Problem 2: For the costs shown in the table below, perform an annual worth (AW) analysis to select the most economic system. The interest rate is i% per year and the cost is thousands of dollars, (6 points) -90 Y - 400 20 System First cost Annual operating cost Update every 10 year Salvage value Life in years z - 650 - 13 F-80 . 40 17 25 10 00