can u pls answer this question for me pls

Preston and Anna are engaged and plan to get married. During 2021, Preston is a full-time student and earns $5,000 from a part-time job. With this income, student loans, savings, and nontaxable scholarships, he is self-supporting. For the year, Anna is employed and has wages of $81,400. Click here to access the standard deduction table to use. Click here to access the Tax Rate Schedules. If an amount is zero, enter, "o". Do not round your intermediate computations. Round your final answer to nearest whole dollar. a. Compute the following: Preston Filing Single Anna Filing Single Gross income and AGI 5,800 81,400 Standard deduction (single) Taxable income Income tax b. Assume that Preston and Anna get married in 2021 and file a joint return. What is their taxable income and income tax Round your final answer to nearest whole dollar. Married Filing Jointly Gross income and AGI Standard deduction (married, filing jointly) Taxable income Income tax C. How much income tax can Preston and Anna save if they get married in 2021 and file a joint retur