An investor purchased a 91-day, $5000.00 T-bill on its issue date for $4976.44. After holding it for 81 days, she sold the T-bill for a yield of 1.72%. (a) What was the original yield of the T-bill? (b) For what price was the T-bill sold? (c) What rate of return (per annum) did the investor realize while holding this T-bill? (a) The original yield of the T-bill was %. (Round the final answer to two decimal places as needed. Round all intermediate values to six decimal places as needed.) (b) The T-bill sold for $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (c) The investor realized a rate of return of %. (Round the final answer to two decimal places as needed. Round all intermediate values to six decimal places as needed.)