1. A commercial bakery has recorded sales (in dozens) for three products during the last 15 workdays: LILO3 Blueberry Cinnamon Workday Muffins Buns Cupcakes 30 18 45 N 34 17 26 W 32 19 27 34 19 23 35 22 22 30 23 48 34 23 29 36 25 20 29 24 14 10 31 26 18 11 35 27 47 12 31 28 26 13 37 29 27 14 34 31 24 15 33 33 22 a. Plot the three time series variables to determine their pattern. b. Forecast workday 16 sales for each of the products using an appropriate naive method. c. If you could use a more sophisticated method than naive, what technique would you use for each variable