The closing price of Apple stock, adjusted for splits and dividends, for the first trading day of December 2007-2011 are given below. The CPI for December of each year is also given (Yahoo Finance and the U.S. Census Bureau). Deflate the stock price series and comment on the financial performance of Apple stock.

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Yea 2007 2008 2009 2010 2011 Price (S) 198.08 85.35 210.73 322.56 405.00 CPI 210.0 210.2 215.9 219.2 225.7