a. Margie is 15 and claimed as a dependent by her parents. She has $800 in dividends : income and $1,400 in wages from a part-time job. b. Ruby and Woody are married and file a joint tax return. Ruby is age 66, and Woody s is 69 . Their taxable retirement income is $10,000. c. Shonda is age 68 and single. She is claimed by her daughter as a dependent. Her earned income is $500, and her interest income is $125. d. Frazier, age 55 , is married but is filing a separate return. His wife itemizes her deductions