The WTO became a formal entity for transnational governance following its earlier, formative precursor known as the General Agreements on Tariffs and Trade (GATT), with the Doha Round serving as the most recent formal discussions on different agreements for the world trade system. a. True
b. False

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.