Today is November 1 2021, Jason plans to make a 360-day investment using two consecutive 180-day $500,000 bank bills. The maturity proceeds of the first bill will be rolled over into the second bill. The purchase yields for the two 180-day bills will be 3.07% and 3.46% p.a., respectively. Note that any surplus funds after 180 days can be invested for 180 days at a rate of 3.72% p.a. simple interest. a) Calculate the price of first bank bill. Round your answer to four decimal places. a. 491611.6241 b. 492543.0334 c. 493035.5765 d. 490992.6391