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For the given sales data over the past 4 years, the average seasonal demand is 1.276 aldibonts (round your response to fwo decimal places). For the given saies data over the past 4 years, the average demand in spring is sailboats (round your response to hvo decimal places). The relationship for determining the seasonality index is: Based on the given sales for the past 4 years, the seasonality index for the spring period = (round your rosponse to two docimal places). Eased on the given forecast for yeat 5 and using the seasonal model: Expected Seasonal Demand = ( Expected Yearly Domand/4 ) (Seasonality Index ). the demand level for George's saiboats in the spring of year 5 will be sailboats (enter a whola numbor). George has forecasted that annual demand for his sailboats in year 5 will equal 5.600 sailboats