Answer
${$4,000}$ for both questions
Work Step by Step
The average value of a used car exceeds that of a bad used car by ${$9,000}$ - ${$5,000}$ = ${$4,000}$
The value of a good used car exceeds that of the average value of a used car by ${$13,000}$ - ${$9,000}$ = ${$4,000}$