Using the quarterly data in Table A-2 for the period 1947–2010 (Appendix A), attempt to identify the recession phases and the expansion phases of the basic business cycle depicted in Figure 1-4. (The official start and end of each phase of a business cycle is determined by the National Bureau of Economic Research Business Cycle Dating Committee. The committee looks at more data than simply GDP in determining when each phase occurs and dates phases by months, not quarters. Therefore your answer will only approximate the official recession and expansion phases; for more details on the way the committee determines when each phase occurs and the official dates of business cycles, go to www.nber.org/cycles/main.html.)