The table below reports the annual stock price in September for Apple from $2005$ to $2014.$ Develop a simple index for the change in

earning per share over the period. Use $2005$ as the base period. $(5$ points$)($Indexes should be rounded to $2$ decimal places and be in

percentages $($e$.$g$.131\mathrm{.}32$ instead of $1\mathrm{.}31))$

Click here for the Excel Data File. Data file should open in a new browswer window. Select "File" then "Save As$"$ to download the file to

your computer and be able to use it in Excel.

a$.$ By what percent have stock prices changed from $2005$ to $2009?(1$ point$)$

b$.$ By what percent have stock prices changed from $2005$ to $2014?(1$ point$)$

c$.$ By what percent have stock prices changed from $2009$ to $2014?(1$ point$)$