Consult Figure below to finish blanks in Question 16 and 17. CurveSSrepresents a domestic supply curve for some good X; if X is a competitive industry, thenSSrepresents the horizontal sum of the marginal cost curves of many firms. CurseDDrepresents domestic demand for the same good. It is implicitly assumed that consumers do not care where the good was made; they simply want to buy the indicated quantities at the indicated prices.