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For each of the below production functions, find the minimum cost of producing 2 units of output when input prices are w1 = 5 and w2 = 2. Wherever rounding is needed, please round to 3 decimal points. a) (2 points) f(Z1, Z2.) = [min{ z1, 3z2 } ]2 b) (2 points) f(Z1 , Z2) = Z1 (Z2 - 8)