Which of the following is most likely to be true for a portfolio of 40 randomly selected stocks? a. the riskiness of the portfolio is the same as the riskiness of each stock if it was held in isolation. b. the beta of the portfolio is less than the average of the betas of the individual stocks. c. the beta of the portfolio is equal to the average of the betas of the individual stocks. d. the beta of the portfolio is larger than the average of the betas of the individual stocks. e. the riskiness of the portfolio is greater than the riskiness of each of the stocks if each was held in isolation.

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.)