a-1. Select the cortect data chart and fit an appropriate model to it. 0-2. Forecast the preceding elght years, and determine the forecast erfors. (Negotlve answers should be indlcated by a minus slgn. Do not round intermediete calculations and round your final enswer to 2 decimal places.) 6.3. Constuct 2 s consrol 1lmits (Round the final answer to 2 decimal pleces) 2 scontrol amits are = A textbook publishing company has compiled data on total annual sales of its business textbooks for the preceding eight year a-2. Forecast the preceding eight years, and determine the forecast errors. (Negatlve answers should be Indlcate Do not round intermedlate calculations and round your final answer to 2 decimal places.) a.3. Construct 2s control limits. (Round the final answer to 2 decimal places.) 2s control limits are b. Using the model, forecast textbook sales for each of the next five years. (Round the final answers to 1 decimal plac c. Suppose actual sales for the next five years turn out as follows: Calculate the forecast errors for years 9 to 13 . Is the forecasting process in control? a-1. Select the cortect data chart and fit an appropriate model to it. 0-2. Forecast the preceding elght years, and determine the forecast erfors. (Negotlve answers should be indlcated by a minus slgn. Do not round intermediete calculations and round your final enswer to 2 decimal places.) 6.3. Constuct 2 s consrol 1lmits (Round the final answer to 2 decimal pleces) 2 scontrol amits are = A textbook publishing company has compiled data on total annual sales of its business textbooks for the preceding eight year a-2. Forecast the preceding eight years, and determine the forecast errors. (Negatlve answers should be Indlcate Do not round intermedlate calculations and round your final answer to 2 decimal places.) a.3. Construct 2s control limits. (Round the final answer to 2 decimal places.) 2s control limits are b. Using the model, forecast textbook sales for each of the next five years. (Round the final answers to 1 decimal plac c. Suppose actual sales for the next five years turn out as follows: Calculate the forecast errors for years 9 to 13 . Is the forecasting process in control