The rate of change of the value of goods exported from a countn/ between 1990 and 2001 can be modeled as E'(t) = 1.662t2 + 16.476t + 7.632 billion dollars per year and the rate of change of the value of good imported into the country during those years can be modeled as I'(t) = 4.919t + 40.861 billion dollars per year where t is the number of years since 1990. (a) Calculate the difference between the accumulated value of imports and the accumulated value of exports from the end of 1990 through 2001. (Round your answer to three decimal places.) $ billion (b) Is the answer from part (a) the same as the area of the region(s) between the graphs of E' and I'? 0 Yes O No Explain. Since the graphs ---Se|ect- v , the answer to part (a) --Select-- v the area of the region(s) between the curves