Question: Suppose the production function for good q is given by q = 3k + 2l where k and l are capital and labor inputs. Consider

Suppose the production function for good q is given by q = 3k + 2l where k and l are capital and labor inputs. Consider three statements about this function: I. The function exhibits constant returns to scale. II. The function exhibits diminishing marginal productivities to all inputs. III. The function has a constant rate of technical substitution. Which of these statements is true? (please give the explanation and answer)

(a) All of them

(b) None of them

(c) I and II, but not III

(d) I and III, but not II

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