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Problem $18-24($Algo$)$

Zeus Computer Chips, Incorporated used to have major contracts to produce low$-$density memory chips. The market has been declining during the past three years because of the new high$-$density chips, which it cannot produce, so Zeus has the unpleasant task of forecasting next year. Here is the demand over the past $12$ quarters:

QUARTER DEMAND QUARTER DEMAND QUARTER DEMAND

$14,79053,49593,195$

$23,49562,795102,195$

$34,29573,495112,795$

$43,19582,495121,795$

Use regression and seasonal indexes $($Model II$)$ to forecast the demand for the next four quarters.