Jeff and Rob have a difficult time getting along at work. Most days, Jeff spends a lot of time cracking jokes and goofing off, while Rob constantly nags him and tells him to act like a grown up. On days when Jeff is more reserved, Rob does not nag him, hoping that this will result in improved behavior down the road. This is an example of which form of behavior modification?A. Empowerment. B. Extinction. C. Punishment. D. Avoidance learning. E. Positive reinforcement.

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.)