What interest rates are implied by the following lending arrangements?
a. You borrow $500 and repay $555 in one year.
b. You lend $1,850 and are repaid $2,078.66 in two years.
c. You lend $750 and are repaid $1,114.46 in five years with quarterly compounding.
d. You borrow $12,500 and repay $21,364.24 in three years under monthly compounding.