Problem:
Here are the cash flows for two mutually exclusive projects
Project    C0    C1    C2    C3
A    (20,000)    8,000 8,000   8,000
B    (20,000)       0        0    25,000
a) at what interest rates would you prefer project A to B
b) what is the IRR of each of each project
The response has to be in excel format