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Demand at Nature Trails Ski Resort has a seasonal pattern. Demand is highest during the winter, as this is the peak ski season. However, there is some ski demand in the spring and even fall months. The summer months can also be busy as visitors often come for summer vacation to go hiking on the mountain trails. The owner of Nature Trails would like to make a forecast for each season of the next year. Total annual demand has been estimated at 3,900 visitors. Given the last two years of historical data, what is the forecast for each season of the next year? (Round average demand to 2 decimal places, e.s. 15.25. Round seasonal index and average seasonal index to 3 decimal places, es. 15.253. Round final answers to 0 decimal places, es. 5,125.) (Round average demand to 2 decimal places, eg. 15.25. Round seasonal index and average seasonal index to 3 decimal places, eg. 15.253. Round final answers to 0 decimal places, es. 5, 125.)