please help and explain

Scot and Vidia, married taxpayers, earn $258,000 in taxable income and $7,700 in interest from an investment in City of Tampa bonds. Using the U.S. tax rate schedule for married filing jointly, how much federal tax will they owe? What is their average tax rate? What is their effective tax rate? What is their current marginal tax fate? Note: Do not round intermediate calculations. Round "Average tax rate" \& "Effective tax rate" to 2 decimal places