Question: The last three changes in r, y, and pi are given next. What are the predicted values of the next set of changes in these

The last three changes in r, y, and pi are given next. What are the predicted values of the next set of changes in these series?
r y pi
-1.41 -0.019420 2.31
-0.48 0.015147 -1.01
0.66 0.003303 0.31

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