Campbell, a single taxpayer, earns $400,000 in taxable income and $2,000 in interest from an investment in State of NeW York bonds. (Use the U.S. tax rate schedule.) Required: a. How much federal tax will she owe? b. What is her average tax rate? c. What is her effective tax rate? d. What is her current marginal tax rate? Complete this question by entering your answers in the tabs below. How much federal tax will she owe? (Do not round intermediate calculations. Round "Federal tax" to the nearest dollar.) 2021 Tax Rate Schedules Individuals Schedule Y-1-Married Filino Inintlv nn n...ol:e