Can I have some help with This Problem please.

Thanks so much

Jacob Cornwall has a business in which he's invested $250,000 of his own money, which is the firms only capital. (There are no other equity investors and no debt.) In a recent year, the firm had net income of $20,000 for a return on equity of 8% ($20,000/$250,000). What will the firm s return on equity he next year if net income from business operations remains the since but it borrows $150,000 returning the same amount to Jake from the equity account if: The after tax interest rate is 6%. The after tax interest rate is 10%. Comment on the difference between the results of a and b