4. Zeus Computer Chips, Inc., used to have major contracts to produce the Centrino-type chips. The market has been declining during the past three years because of the quad-core chips, which it cannot produce, so Zeus has the unpleasant task of forecasting next year. The task is unpleasant because the firm has not been able to find replacement chips for its product lines. Here is demand over the past 12 quarters: Two YEARS AGO UNITS LAST YEAR UNITS THIS YEAR UNITS I 4800 H 3500 H 3200 II 3500 II 2700 II 2100 III 4300 III 3500 III 2700 IV 3,000 IV 2.400 IV 1700 Use the decomposition technique to forecast demand for the next four quarters