According to Statistics Canada, Canada’s exports and imports of energy (combined totals of fossil fuels, hydro, and nuclear, all measured in petajoules) over a five-year period were as follows:a. Using 2014 as the base year, construct index numbers for each of exports and imports.b. Were exports or imports more volatile over this time period? Explain how you know.c. Using your constructed index numbers, what was the percentage change in exports and imports from 2014 to 2018?

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2014 2015 2016 2017 2018 Exports 11 794 12 210 12 552 13 252 13 756 Imports 3264 3455 3651 3916 4003