Chapter 18 Homework Assignment i Saved Help Save & Exit Submit Check my work 4 Using the following time series data, respond to the following items. Period Quarter Sales 25 $ 812 920 points 1, 268 1, 280 832 eBook 791 1, 071 Print 1, 109 965 References 10 844 961 1, 160 751 674 828 16 1, 033Chapter 18 Homework Assignment 0 Saved Help Save & Exit Submit w 4 d. Evaluate a seasonally adjusted trend forecasting model. What is the MAD? (Round your answers to 3 decimal places.) A 25 1 1 points 2 2 3 3 eBook 4 4 Prim 5 1 6 2 References 7 3 B 4 9 1 10 2 11 3 12 4 13 1 14 2 v Saved Help Save 8: Exit Submit w Chapter 18 Homework Assignment 0 4 e. What are the quarterly indexes? (Round your answers to 3 decimal places.) A 25 1 points 2 3 eBuok 4 Print References f. Forecast sales for future periods 17 through 20. (Round your answers to 3 decimal places.) Period 17 Sales Period 18 Sales