Suppose a borrower is offered a 3/1 ARM at 3% with a 2% per year cap and a 6% lifetime cap. The 1-year T-bill index is now 1% and the margin is 2.75%. To see if the loan is a safe-harbor QM under the Dodd-Frank law, the lender must calculate the borrower's debt-to-income ratio using an interest rate of _----- on the loan. 1 7% 9% 3% 3.75% 5.75% Suppose a borrower is offered a 3/1 ARM at 3% with a 2% per year cap and a 6% lifetime cap. The 1-year T-bill index is now 1% and the margin is 2.75%. To see if the loan is a safe-harbor QM under the Dodd-Frank law, the lender must calculate the borrower's debt-to-income ratio using an interest rate of _----- on the loan. 1 7% 9% 3% 3.75% 5.75%