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Problem 1. (20 points) Consider the following functions, where x=CO2 emissions (in millions of tons). D(x) = A . In (x), with A>O ii) D(x) = B . ex, with B>0 iii) D(x) = x2 iv ) D(x) = ax2 + bx + c if a=-1, b=2, c=0 and O