1. (table: soybean cost) look at the table soybean cost. the costs of production of a perfectly competitive soybean farmer are given in the table. what is the shut-down price for this firm?
a) $11 b) $10 c) $12 d) $13
3. de beers became a monopoly by: a) establishing control over diamond mines. b) technological superiority. c) ownership of a patent. d) economies of scale.

Stock a has a beta of 1.2 and a standard deviation of 20%. stock b has a beta of 0.8 and a standard deviation of 25%. portfolio p has $200,000 consisting of $100,000 invested in stock a and $100,000 in stock b. which of the following statements is correct? (assume that the stocks are in equilibrium.) (a) stock b has a higher required rate of return than stock a. (b) portfolio p has a standard deviation of 22.5%. (c) portfolio p has a beta equal to 1.0. (d) more information is needed to determine the portfolio's beta. (e) stock a's returns are less highly correlated with the returns on most other stocks than are b's returns.