PLEASE show how to calculate 38

Please help by showing how you got every number. I will rate! Also please use tax rates provided. 37 Campbell, a single taxpayer, earns $400,000 in taxable income and $2,000 in interest LO 1.3 from an investment in State of New York bonds. Using the U.S. tax rate schedule how much federal tax will she owe? What is her average tax rate? What is her effective tax rate? What is her current marginal tax rate? 38, Using the facts in problem 37, if Campbell earns an additional $15,000 of taxable LO 13 income, what is her marginal tax rate on this income? What is her marginal rate if, instead, she had $15,000 of additional deductions