only need the answer to Q10, please show all work

Markum Enterprises is considering permanently adding $100 million of debt to its capital structure. Markum's corporate tax rate is 35%. a. Absent personal taxes, what is the value of the interest tax shield from the new debt? Question 10 0/2 pts b. If investors pay a personal income tax rate of 40% on interest income, and a tax rate of 20% on income from dividends and capital gains, what is the value of the interest tax shield from the new debt