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Florida Powet and Light has committed to building solar power plant. Jo Anne, an industrial engineer working for FPL, has been charged with evaluating the three current designs. FPL uses an interest rate of 10% and a 20-year horizon Design 1: Flat Solar Panels A field of "flat" solar panels angled to best catch the sun will yield 2.6 MW of power and will cost $87 million initially, with first-year oper- ating costs at $2 million, growing $250,000 annually. It will produce electricity worth $69 million the first year and increasing by 8% each year thereafter. Design 2: Mechanised Solar Panels A field of mechanized solar panels rotates from side to side so that they are always positioned at right angles to the sun's rays. maximizing the production of electricity, This design will yield 3.1 MW of power and will cost $101 million initially, with first-year operating costs at $2.3 million, growing by $300,000 annually. It will produce electricity worth $8.8 million the first year and increase ing 8% each year thereafter. Design Solar Chillector Field This design uses a field of mirrors to focus the sun rays ont boiler mounted tower Their than produces stem and gekruten the same way lite plant will yield Water and ve 5 million by