Answer
See the picture.
Work Step by Step
Total: 396 buyers.
Relative frequency marginal distribution for "New": $\frac{207}{396}\approx0.5227$
Relative frequency marginal distribution for "Used": $\frac{189}{396}\approx0.4773$
Relative frequency marginal distribution for "Not too satisfied": $\frac{36}{396}\approx0.0909$
Relative frequency marginal distribution for "Pretty satisfied": $\frac{157}{396}\approx0.3965$
Relative frequency marginal distribution for "Extremely satisfied": $\frac{203}{396}\approx0.5126$
