2019 tax rate schedule provided below, please show work so I can understand how to solve! Thanks!!

David and Ruby are engaged and plan to get married. During 2019, David is a full-time student and earns $6,700 from a part-time job. With this income, student loans, savings, and nontaxable scholarships, he is self-supporting. For the year, Ruby is employed and has wages of $59,400. 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: David Filing Single Ruby Filing Single Gross income and AGI Standard deduction Taxable income Income tax b. Assume that David and Ruby get married in 2019 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 Standard deduction Taxable income Income tax c. How much income tax can David and Ruby save if they get married in 2019 and file a joint return? 2019 Tax Rate Schedules of the amount over- $ 0 Head of householdSchedule Z If taxable income is: But not Over- over- The tax is: $ 0 $ 13,850 ......... 10% 13,850 52,850 $ 1,385.00 + 12% 52,850 84,200 6,065.00 + 22% 84,200 160,700 12,962.00 + 24% 160,700 204,100 31,322.00 + 32% 204,100 510,300 45,210.00 + 35% 510,300 ......... 152,380.00 + 37% Married filing separatelySchedule Y-2 Single-Schedule X If taxable of the income is: But not amount Over- over- The tax is: over- $ 0 $ 9,700 ......... 10% $ 0 9,700 39,475 $ 970.00 + 12% 9,700 39,475 84,200 4,543.00 + 22% 39,475 84,200 160,725 14,382.50 + 24% 84,200 160,725 204,100 32,748.50 + 32% 160,725 204,100 510,300 46,628.50 + 35% 204,100 510,300 153,798.50 + 37% 510,300 Married filing jointly or Qualifying widow(er) Schedule Y-1 If taxable of the income is: But not amount Over- over- The tax is: over- $ 0 $ 19,400 ......... 10% $ 0 19,400 78,950 $ 1,940.00 + 12% 19,400 78,950 168,400 9,086.00 + 22% 78,950 168,400 321,450 28,765.00 + 24% 168,400 321,450 408,200 65,497.00 + 32% 321,450 408,200 612,350 93,257.00 + 35% 408,200 612,350 164,709.50 + 37% 612,350 13,850 52,850 84,200 160,700 204,100 510,300 of the amount over- $ 0 If taxable income is: Over- $ 0 9,700 39,475 84,200 160,725 204,100 306,175 But not over- $ 9,700 39,475 84,200 160,725 204,100 306,175 The tax is: .........10% $ 970.00 + 12% 4,543.00 + 22% 14,382.50 + 24% 32,748.50 + 32% 46,628.50 + 35% 82,354.75 + 37% 9,700 39,475 84,200 160,725 204,100 306,175