A couple will retire in 50 years, they plan to spend about $20,000 a year in retirement, which should last about 25 years. They believe that they can earn 9% interest on retirement savings. a. If they make annual payments into a savings ponow much wom they need to save each year? Assume the first payment comes in 1 year (Do not round intermediate calculations. Round your answer to 2 decimal places.) Enter your search term Annual savings b. How would the answer to part (a) change if the couple also realize that in 20 years they will need to spend $50,000 on their child's college education? (Do not round intermediate calculations, Round your answer to 2 decimal places.) Annual savings