Could someone help me answer question a to e

Which of the following best explains why treasury bonds have an effect on the size of the money supply? a. the amount of treasury bonds in circulation affects both unemployment and inflation. b. the government can spend more money and charge lower taxes by using treasury bonds. c. the federal reserve bank can buy and sell these bonds to raise or lower bank deposits. d. the interest paid on treasury bonds influences the interest rates charged by private banks. 2b2t

Suppose life expectancy in years (l) is a function of two inputs, health expenditures (h) and nutrition expenditures (n) in hundreds of dollars per year. the production function is upper l equals ch superscript 0.40 baseline upper n superscript 0.60l=ch0.40n0.60. beginning with c = 1, a health input of $400400 per year (hequals=44) and a nutrition input of $400400 per year (nequals=44), show that the marginal product of health expenditures and the marginal product of nutrition expenditures are both decreasing. the marginal product of health expenditures when h goes from 44 to 55 is nothing, and the marginal product of health when h goes from 66 to 77 is nothing. (round your answers to three decimal places.)

Which of the following is considered part of a country’s infrastructure?