If the U. S. government imposes a tariff on imported steel to protect American steel manufacturers, then consumers pay less for steel sold in the nation.
a. consumers benefit from lower priced domestic steel.
b. consumers pay more for steel sold in the nation.
c. producers will export more domestic steel to foreign nations.
d. producers will supply more domestic steel at lower prices.

answer; complain or request hazard correction from your employer;

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.