Problem: A commercial bakery has recorded sales (in dozens) for three products during the last 15 workdays: Blueberry Cinnamon Day Muffins buns Cupcakes 30 18 45 2 34 17 26 3 32 19 27 4 34 19 23 5 35 22 22 6 30 23 48 7 34 23 29 8 36 25 20 9 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 Requirements: 1. Plot the three time series variables to determine their patterns using Microsoft Excel. 2. Forecast workday 16 sales for each of the products using an appropriate naive method