A textbook publishing company has compiled data on total annual sales of its business textbooks for the preceding eight years: Year: 1 2 3 4 5 6 7 8 Sales(000): 37.30 44.40 47.20 51.40 54.40 57.00 61.40 69.60 a-1. Select the correct data chart and fit an appropriate model to it. Chart A Chart B Chart C picture picture picture (Click to select) a-2. Forecast the preceding eight years, and determine the forecast errors. (Negative answers should be