a couple will retire in 50 years they plan to spend about 22000 a year in retirement. which should last about 25 years. they believe that they can earn a real interest rate of 8% on retirement savings. a. if they make annual payments into a savings plan how much will they need to save each year? b. how much the answer in part a change if the couple also realize that in 20 years they will need to spend 52000 on their child college education