Jorge and Anita, married taxpayers, earn $$155,000$ in taxable income and $$45,000$ in interest from an investment in City of Heflin bonds. $($Use the U$.$S$.$ tax rate schedule for married filing jointly$).$Required:a$.$ If Jorge and Anita earn an additional $$105,000$ of taxable income, what is their marginal tax rate on this income?b$.$ What is their marginal rate if$,$ instead, they report an additional $$105,000$ in deductions?$($For all requirements, do not round intermediate calculations. Round your answers to $2$ decimal places.$)$ find a$.$ Marginal tax rate. b$.$ marginal tax rate