Exhibit 6.3 -Refer to Exhibit 6.3,which Shows Ken's Demand Curve for Neckties.Point

Exhibit 6.3

-Refer to Exhibit 6.3,which shows Ken's demand curve for neckties.Point a on the curve shows that when the price of neckties is $5,Ken purchases four neckties.Point b on the curve shows that when the price of neckties falls to $4,he purchases five neckties.At point b,the dollar value of the total utility is valued at _____

A) $30.
B) $26.
C) $20.
D) $35.
E) $25.