Campbell, a single taxpayer, earns $$404,500$ in taxable income and $$2,360$ in interest from an investment in State of New York bonds. $($Use the U$.$S$.$ tax rate schedule$).$

Required:

a$.$ If Campbell earns an additional $$15,900$ of taxable income, what is her marginal tax rate on this income?

b$.$ What is her marginal rate if$,$ instead, she had $$15,900$ of additional deductions?

Note: For all requirements, do not round intermediate calculations. Round percentage answers to whole percent.

a$.$ Marginal tax rate

$\%$

b$.$ Marginal tax rate

$\%$