Calculate the APR and rEAR of non free trade credit associated with credit terms of $3/15,$ net $60,$ and $2\mathrm{.}5/25,$ net $85,$ assuming that customers who do not take the discount

a$.$ pay on the last due date. Assume there are $360$ days in a year.Do not round intermediate calculations. Round your answers to two decimal places.

b$.$delay payment until $15$ days after the last due date. asume there are $360$ days in a year. Do not round intermediate calculations. Round your answer to two decimal places.