Consider the streams of income given in the following table:

Income Stream

End of Year A B

1 $4,000 $1,000

2 $3,000 $2,000

3 $2,000 $3,000

4 $1,000 $4,000

Total $10,000 $10,000

a. Find the present value of each income stream, using a discount rate of 4%, then repeat those calculations using a discount rate of 9 %