A commercial bakery has recorded sales (in dozens) for three products, as shown below:

Day Blueberry Muffins Cinnamon Bun Cupcakes

1 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

a Based on the Plot for each data set, predict orders for the following day for each of

the products using an appropriate naive method.

b.What should the use ofsalesdata instead ofdemandimply?