Mary Parker is 24 years old, single, lives in an apartment, and has no dependents.Last year she earned $38,700 as a sales assistant for Texas Instruments; $3,450 of her wages were withheld for federal income taxes.In addition, she had interest income of $142.Calculate her taxable income, tax liability, and tax refund or tax owed using tax information contained for2007atwww.irs.gov.