1. We have obtained the following information about GDP in the U.S. economy from the Bureau of [2 points) Year Quarter 2007 01 eeeee 2008 Real GDP (billions of chained 2012 $) $15,493.3 $15,582.1 $15,666.7 $15,762.0 $15,671.4 $15,752.3 $15,667.0 $15,328.0 $15,155.9 $15,134,1 $15,189.2 $15,356.1 $15,415.1 $15,557.3 $15,672.0 $15,750.6 Q1 @2 Q3 Q4 Q1 Q2 Q3 04 Q1 Q2 Q3 Q4 2009 2010 a. During which quarters was the U.S. economy in an expansion? During which quarters was the U.S. economy in recession? b. In what quarter did the U.S. economy reach the business cycle peak? In what quarter did the U.S. economy finally reach the trough of the business cycle