A retirement-minded couple decides to set aside $2,900 each year for a savings plan that pays 9% interest. In 15 years, they will receive a $21,000 gift, which can still be invested. a. How much money will they have saved 30 years from now? (Do not round up intermediate calculations. Round your answer to 2 decimal places.) Accumulated savings $ b. If their goal is to retire with $790,000 in savings, how much should they save each year? (Do not round up intermediate calculations. Round your answer to 2 decimal places.) Additional annual savings required $