Question 4 The global population explosion during the twentieth century was mainly driven by CO)a rapid increase in fertility rates, especially in developing countries. ()an increasing global population growth rate throughout the century. O the 1960s baby boom experienced by many large developed countries. O an increase in life expectancy, especially in developing countries.Question 5 Suppose only two countries make up the world economy: A and B. Only two commodities are produced: wheat and rice. The only factor of production is labour and each country has 400 workers. Assume that producers are competitive. labour is perfectly mobile between production sectors and households in both countries always want to consume both goods. The following table describes how many workers are required to make one computer and one sack of rice in each country. A | B One bushel of wheat 10 | 40 One sack of rice 15 20 According to the Ricardian model, in a free trade equilibrium the price of a bushel of wheat relative to a sack of rise would be: between 2 and 3.33 -'.__.'- between 0.6? and 2. __.' between 3.33 and 4. between 0.5 and 0.57. Question 6 In Country X there are only two income levels: $10,000 and $40,000. Twenty million individuals earn the low income and twenty million earn the high income. The Gini coefficient associated with this income distribution is given by 0.35 0.70 0.30 C 0.65