You are looking at an investment that has an effective annual rate of 13.1 percent. What is the effective semiannual return? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g, 32.16.) Effective semiannual returm What is the effective quarterly return? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Effective quarterly return What is the effective monthly return? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Effective monthly return