when filling the registration statement with the SEC on an IPO the issuer can also include any securities it intends to issue in upcoming three year period. When this is done, the registration of the shares that can be issued in the upcoming three years would be called a

answer///a road map;

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.