Consider the following production functions. Firm A: Q = 5123 K 10 Firm B: Q = L + K Firm C; Q = min [L , K] Identify the kind of returns to scale faced by each of Firms A, B, and C. Explain your answer. (6 marks) b. Draw three graphs to show a few isoquants for each of Firms A, B, and C. (6 marks) C. Consider the case of Firm A. Suppose that the price of labour (w) is $10 per worker and the price of capital (r) is $40 per unit. If the cost outlay (C) of the firm is $6,000, what are the optimal units of labour and capital the firm should hire to minimize cost? Explain your answer. (7 marks) d. Repeat part c) for Firm B OR Firm C. Explain your answer on a graph with isoquants and isocosts. (6 marks)