machines), L is labor (the number of workers), and H is human capital (the number of college degrees among the workers).The production anction is Y: KN?) L1H HIE?)- a. Derive an expression for the marginal product of labor. How does an increase in the amount of human capital affect the marginal product of labor? b. Derive an expression for the marginal product of human capital. How does an increase in the amount of human capital affect the mar ginal product of human capital