(e) (5 ptsjlf consumers are concerned about the total cost of using a refrigerator, consumers will pay less for refrigerators that are more expensive to operate. Suppose that a refrigerator is expected to last shelve years and that consumers discount future expenditures at 4% {real rate of interest). We would then expect that a one dollar increase in the annual cost of operation would reduce the price a consumer is willing to pay by De consumers consider the totai cost of ownership in the manner described above when they purchase a refrigerator? Write down and test a null hypothesis to answer this question. Clearly state your conclusions