Reading #15 Economics question long, question, correct, example

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I’m on page 615 (Reading #15, example number 9 in CFAI text).  In the second question, it asks us to calculate the long term sustainable earnings growth rate using data from ‘95-‘08.  I am not understanding how they are getting 7.5% and 4.6% (China and India’s long-term growth of labor productivity).  There’s a footnote at the end of the question saying “calculated as gerometric mean growth rate using data from 1995-2005 and 2005-2008.  Can anyone show me the correct calculation to get those numbers?