P5.1 Your portfolio had the values in the following table for the four-year period listed. Calculate your average return over the four-year period. Ending Value Year Beginning Value 2007 $50,000.00 2008 $55,000.00 2009 2010 $58,000.00 $65,000.00 $55,000.00 $58,000.00 $65,000.00 $70,000.00