You are a manager at Asda. You have been given the demand data for the past 10 weeks for swim rings for children. You decide to run three different types of forecasting methods on the data to see which gives you best forecast. What would your 3 period moving average forecast be for week 22?

Week Demand
12 1317
13 1307
14 1261
15 1258
16 1267
17 1256
18 1268
19 1277
20 1277
21 1297

a. 1336
b. 1375
c. 1284
d. 1468
e. None of the above