Refer to the above figure. At a price of $10, excess quantity supplied equals

At the point where total utility is at its peak, marginal utility is:

a. zero. b. positive. c. negative. d. positive, but declining. e. positive, but increasing.

People's skepticism about central bankers' announcements of their intentions stems from the fact that policymakers may act in a fashion that is time inconsistent

a. True b. False Indicate whether the statement is true or false