A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year Sales (000): 1 37.60 2 42.40 3 49.30 4 53.40 5 55.20 6 57.70 7 60.80 8 69.20 9 74.70 a. Using an appropriate model, forecast textbook sales for each of the next five years. (Round your intermediate calculations to 3 decimal places and final answers to 2 decimal places.) Year 10 11 12 13 14 Forecast