First 2 questions pertain to these links:

http://mindtools.net/GlobCourse/formula.shtml
http://www.cliffsnotes.com/study_guide/GDP.topicArticleId-9789,articleId-9733.html

Second set of questions:
http://inflationdata.com/inflation/inflation_articles/calculateinflation.asp
http://www.investopedia.com/terms/i/inflation.asp#axzz1lAEXt7uC

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