This is another finance question. I have put it in the attachments. Thanks!

A firm 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 % 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 % 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 % 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).) Effective annual interest rate %