題組內容

4. Suppose there are 80 identical competitive firms, each faces the same short-run total cost function $$\mathrm{STC}(Q) = 96 + 2Q^2$$, and assume all its fixed costs are sunk. Let the market demand equals $$D(P) = 360 - 4P$$, answer the following questions:

(d) \( (5\%) \) What are your answers to (a) and (c) when the market demand becomes \( D(P) = 150 - 5P \)?