Answer
See the picture.
Work Step by Step
Total: $21+18+7+3+1+0+1=51$.
Relative frequency for "30,000-35,999" is $\frac{21}{51}\approx0.4118$
Relative frequency for "36,000-41,999" is $\frac{18}{51}\approx0.3529$
Relative frequency for "42,000-47,999" is $\frac{7}{51}\approx0.1373$
Relative frequency for "48,000-53,999" is $\frac{39}{51}\approx0.0588$
Relative frequency for "54,000-59,999" is $\frac{1}{51}\approx0.0.0196$
Relative frequency for "60,000-65,999" is $\frac{0}{51}=0$
Relative frequency for "66,000-71,999" is $\frac{1}{51}\approx0.0196$
