How do I figure out all of these problems on this worksheet?

Homework 4 (Chapter 26 & 27) 1. Compare the firm's least-coast rule with how consumers decide how to spend their money. 2. What is the relationship between labor productivity and wage rates? 3. Using the theory developed in this chapter, explain the following: a. Why a worker in Ethiopia is likely to earn much less than a worker in Japan. b. Why the army expects recruitment to rise during economic recessions. c. Why basketball stars earn relatively large incomes. d. Why jobs that carry health risks offer higher pay than jobs that do not. 4. The following table depicts the number of grapes that can be picked in an hour with varying amounts of labor: Number of Pickers 1 2 3 4 5 6 7 8 Output of Grapes (in flats) 20 38 53 64 71 74 74 70 a. How many pickers will be hired at a wage rate of $6/hour? b. If the wage rate doubles to $12/hour, how many pickers will be hired? c. If the productivity of all workers doubles, how many pickers will be hired at a wage of $12/hour? 5. Apples can be harvested by hand or machine. Handpicking yields 80 pounds per hour; mechanical pickers yield 120 pounds per hour. a. If the wage rate of human pickers is $8/hour and the rental on a mechanical picker is $15/hour, which is more cost effective? b. If the wage rate increased to $12/hour, which would be more cost effective? 6. What does the elasticity of demand for labor have to do with the wage-employment trade-off? 7. Explain why the monopsonist pays a wage rate less than labor's marginal revenue product