I just need the last 2 questions :)

Steve is a Janitor worker in North Dakota. His salary is $22,800 and he is paid weekly. He married filing separately for his income tax. Use the information to answer the following questions.
How many paychecks does Steve receive each year? 52

What is the state income tax for the state of North Dakota? $661.20

What is the base amount of his federal income tax? $1,593

What is the additional percentage Steve will have to pay for Federal income Tax?

What is the total amount of taxes he will have to pay for both federal and state?