Nathan has a 7-year personal loan with the bank. He currently makes equal half-yearly repayments at the end of each 6 months at an interest rate of 6.5% p.a. compounded half-yearly. Which of the following may reduce the total cost of the loan? (may be more than one correct answer)

a. To ask for an interest-only period for the first 3 years of the loan term.

b. To make month-end repayments starting in one month at an equivalent interest rate.

c. To renegotiate the interest rate to 6.5% p.a. compounded monthly.

d. To make repayments at the beginning of each 6 months starting on the borrowing date.

e. To renegotiate the loan term to 10 years.

f. None of the options reduces the total cost of the loan.