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 dual$-$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:

$\backslash$table$[[2007,,2008,,2009,],[$I$,4,800,$I,$3,500,$I,$3,200],[$II$,3,500,$II$,2,700,$II$,2,100],[$III$,4,300,$III,$3,500,$III,$2,700],[$IV$,3,000,$IV$,2,400,$IV$,1,700]]$

Use the decomposition technique to forecast the four quarters of $2010.$