Maybepay Life Insurance Co. is selling a perpetual annuity contract that pays $3,700 monthly. The contract currently sells for $340,000. a. What is the monthly return on this investment vehicle? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the APR? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. What is the effective annual return? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)