The CPI-U has the following annual averages

Year	2006	2007	2008	2009	2010
Index	201.600	207.342	215.303	214.537	218.056

a) for each year from 2007 to 2010, determine the annual inflation rate in percent to three decimal places.

b) Since inflation, like interest, is compounded from period to period, estimate the overall annual inflation rate per year from 2006 to 2010. Suggestion: do not simply average the rates of Part a.