Afirm offers terms of 1.6/10, net 60. a. what effective annual interest rate does the firm earn when a customer does not take the discount? (use 365 days a year. do not round intermediate calculations. enter your answer as a percent rounded to 2 decimal places, e. g., 32.16.) effective annual interest rate 12.49 12.49 correct % b. what effective annual interest rate does the firm earn if the terms are changed to 2.6/10, net 60, and the customer does not take the discount? (use 365 days a year. do not round intermediate calculations. enter your answer as a percent rounded to 2 decimal places, e. g., 32.16.) effective annual interest rate 21.20 21.20 correct % c. what effective annual interest rate does the firm earn if the terms are changed to 1.6/10, net 75, and the customer does not take the discount? (use 365 days a year. do not round intermediate calculations. enter your answer as a percent rounded to 2 decimal places, e. g., 32.16.) effective annual interest rate 9.48 9.48 correct % d. what effective annual interest rate does the firm earn if the terms are changed to 1.6/15, net 60, and the customer does not take the discount? (use 365 days a year. do not round intermediate calculations. enter your answer as a percent rounded to 2 decimal places, e. g., 32.16.)