Dana intends to invest $$42,000$ in either a Treasury bond or a corporate bond. The Treasury bond yields $5$ percent before tax and the

corporate bond yields $6$ percent before tax.

Required:

a$-1.$ Assuming Dana's federal marginal rate is $24$ percent and her marginal state rate is $5$ percent, which of the two options should she

choose? Assume that Dana itemizes deductions.

a$-2.$ How much interest after$-$tax would Dana earn by investing in the corporate bond?

Note: Do not round intermediate calculations and round your final answer to the nearest whole dollar amount.

b$-1.$ If she were to move to another state where her marginal state rate would be $10$ percent, which of the two options should she

choose? Assume that Dana itemizes deductions.

b$-2.$ How much interest after$-$tax would Dana earn by investing in the corporate bond as per requirement b$-1?$

Note: Do not round intermediate calculations and round your final answer to the nearest whole dollar amount.