How much money can be withdrawn at the end of an investment period if:
a. $4016 is invested at the end of each of 3 years at 6%/year compounded annually, with the lump sum then shifted to an investment paying 7.0%/year for an additional 5 years?
b. $8840 is invested at the end of each of 10 years at 9%/year compounded annually, with the lump sum then shifted to an investment paying 5.7%/year for an additional 3 years?
c. $14560 is invested at the end of each of 5 years at 10%/year compounded annually, with the lump sum then shifted to an investment paying 7.4%/year for an additional 8 years? $