2. Calculate the future worth of the following series of payments: $10000 at the end of every year for 5 years at 5% compounded annually $15000 at the end of every year for 10 years at 10% compounded annually $20000 at the end of every year for 15 years at l 5% compounded annually $25000 at the end of every year for 20 years at 20% compounded annually