A firm offers terms of 1.4/10, 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.)

b.) What effective annual interest rate does the firm earn if the terms are changed to 2.4/10, 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.)

c.) What effective annual interest rate does the firm earn if the terms are changed to 1.4/10, 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.)

d.) What effective annual interest rate does the firm earn if the terms are changed to 1.4/15, 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.)