4) a) An investment dealer acquired a $100,000.00, 91-day Government of Canada treasury bill on its date of issue at a price of $99,459.43. What is the annual rate of return? The rate of retum is % (Round the final answer to two decimal places as needed Round all intermediate values to six decimal places as needed.) b) A demand loan for 4191,59 with interest at 9.6% compounded monthly is repaid after 2 years, 11 months. What is the amount of interest paid? The amount of interest is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)