4. (Module 73) Each of the situations below involve people receiving different wages in similar occupations. For each, identify the most likely explanation for the wage differences and explain why that reason applies. a. Davey and Jennifer both work as realtors in Florida, but Jennifer earns 25% more than Davey because she sells more homes each month. b. Fekru and Huanwei are both statisticians in New Jersey, but Fekru earns a higher salary because he has 25 years of work experience and Huanwei only has 10 years of work experience. c. Eric and Melanie are both coal miners in Kentucky, but Melanie joined the union and her union wage is greater than Eric's nonunion wage. d. Pam and Margaret are both truck drivers in Washington, DC. Pam typically drives trucks full of hazardous waste so she earns a higher wage than Margaret who typically drives trucks full of textbooks. (8 points)