1. Use the PV command to find the present value of each of the following future cash flows at a discount rate of 10% per year, compounded monthly: (Warning: Be sure to use the rate thats appropriate for the calculation.)

a. Monthly payments of $1,600 at the beginning of each month for the next six years

b. Monthly payments of $1,600 at the end of each month for the next six years.

c. Year-end payments of $20,000 for each of the next five years.