Utilizing investment assets to gross pay benchmarks, which of the following individuals is likely on target with their investment assets?

a. Ross, age 55, earns $150,000 a year and has invested assets of $900,000.

b. Rachel, age 35, earns $30,000 a year and has invested assets of $15,000.

c. Monica, age 45, earns $60,000 a year and has invested assets of $150,000.

d. Joey, age 25, earns $40,000 a year and has invested assets of $9,000.