Show me the steps to solve 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?

Note: Do not round intermediate calculations. Round "Federal tax" to the nearest dollar.