UESTION FOUR A couple will retire in 50 years; they plan to spend about Ksh 530,000 a year in retirement, which should last about 25 years. They believe that they can earn 10 percent interest on retirement savings. If they make annual payments into a savings plan, how much will they need to save each year? a) Assume the first payment comes in 1 year b) Assume the first payment is made immediately (You may need to make an assumption and your assumption should not conflict with information provided