Your firm invested $2,497,700 in 310-day commercial paper today. At the end of the investment period (in 310 days) the firm will receive $2,596,100. 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 %