The table below shows nominal GDP, exports, and Imports for the United States, Nominal GDP. Exports, and Imports Nominal GDP Exports Imports (billions of (billions of (billions of Year dollars) dollars) dollars ) 2015 $17,219.9 $2, 353.7 $2, 829.5 2016 17, 858.2 2, 382.9 2,936.5 Instructions: Round your answers to one decimal place. If you are entering a negative number include a minus sign. a. Calculate the value of net exports in 2015. $ billion b. Calculate the value of net exports in 2016. billion