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The random walk model is written as: Yt = Yt-1 + m + et . In this model, et represents the a. average of the

The random walk model is written as:Yt=Yt-1+m+et. In this model,etrepresents the

a. average of theX's.

b. average of theY's.

c. forecasted value.

d. random series with mean 0 and some constant standard deviation.

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