Your firm invested $2,502,300 in 310-day commercial paper today. At the end of the investment period (in 310 days) the firm will receive $2,588,700. Required: a. What is the 310-day holding period rate of return on the investment? (Round your answer to 2 decimal places.) HPR % b. How many 310-day periods are there in one year? (Use a 365-day year. Round your answer to 4 decimal places.) Number of periods c. What is the annual percentage rate APR earned on the investment? (Do not round intermediate calculations. Round your answer to 2 decimal places.) APR % d. What is the effective annual rate (EAR)? (Do not round intermediate calculations. Round your answer to 2 decimal places.) EAR %