Compare the total amount of interest that would be paid on a $3,000 loan over a 6-year period with an effective rate of interest of 7.5% per annum, under each of the following repayment plans: (a) The entire loan plus accumulated interest is paid in one lump sum at the end of 6 years. (b) Interest is paid each year as accrued, and the principal is repaid at the end of 6 years. (c) The loan is repaid with level payments at the end of each year over the 6-year period