Homework: 5.3 Annuities, Future Values & Sinking Funds lcore: 0 of 1 pt 8 of 40 (28 complete) x 5.3.9 Find the final amount in the following retirement account, in which the rate of return on the account and the regular contribution change over time. $436 per month invested at 6%, compounded monthly, for 6 years, then $691 per month invested at 7%, compounded monthly, for 6 years. What is the amount in the account after 12 years? $ (Do not round until the final answer. Then round to the nearest dollar as needed.) Enter your answer in the answer box and then click Chock Answer. All parts showing