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The data in columns 1 and 2 in the table below are for a private closed economy. Instructions: For all parts, enter your answers as whole numbers. If you are entering any negative numbers be sure to include a negative sign H in front of those numbers. a. Use columns 1 and 2 to determine the equilibrium GDP for this hypothetical economy. b Now open up this economy to international trade by including the export and import figures of columns 3 and 4. Fill in the gray- shaded cells in columns 5 and 6. Determine the equilibrium GDP for the open economy. What is the change in equilibrium GDP caused by the addition of net exports? c. Given the original $30 billion level of exports, what would be net exports and the equilibrium GDP ifimports were $10 billion less at each level of GDP? Fill in the gray-shaded cells.