13 Suppose the cost function of a firm is zq' "w,' "w: [3] Determine the degree of homogeneity of this cost function. {5 marks} [bl Are costs strictly convex? Explain. {4 + 4 = 3 marks] [c] What is the supply function of this firm? [5 marks} {d} What is the conditional {also called \"contingent"} factor demand function for factor 1 ? [1" marks}