Your firm invested $2,504,600 in 270-day commercial paper today. At the end of the investment period (in 270 days) the firm will receive $2,585,000. a. What is the 270-day holding period rate of return on the investment? (Round your answer to 2 decimal places.) HPR b. How many 270-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? (Round your answer to 2 decimal places.) APR d. What is the effective annual rate (EAR)? (Round your answer to 2 decimal places.) EAR %