The common stock of Mountain Farms has yielded 14.2 percent, 11.7 percent, 3.4 percent, −2.8 percent, and 15.8 percent over the past five years, respectively. What is the geometric average return?

The prebisch–singer hypothesis concludes that: a. technology lowers the cost of manufactured products, so developing countries should see an increase in their terms of trade. b. developing countries experience a long-run decline in their terms of trade, as the demand for primary products in higher-income countries declines relative to their demand for manufactured goods. c. because of unfair trading practices, labor in developing countries is exploited. d. opec has been responsible for a slowdown in the world's standard of living.