The weekly sales (in dollars) for a particular brand of ice cream for a chain of grocery stores located in Melbourne, Australia, follows.

Week	Sale ($)
1	200
2	325
3	121
4	630
5	500

1. Use a four-week moving average to develop a forecast for week 6. (2 marks)

[Answer and show workings here]

1. Use exponential smoothing with a smoothing constant of =0.7 to develop a forecast for week 6. (6 marks)

[Answer and show workings here]

1. Which of the two methods do you prefer and why? (4 marks)