Using simple moving averages and the following time series data, respond to each of the items.

a. G raph the time series data. What do you observe?

b. Compute all possible forecasts using a four-period simple moving average model.

c. Compute all possible forecasts using a six-period simple moving average model.

d. Compute the MADs for each moving average forecast.

e. Which forecast has less error?

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Period Demand Period Demand 1 126 101 112 7 132 3 135 8. 141 4 145 110 106 10 131