What is the project's internal rate of return?

Consider a project with the expected cash flows:

Year Cash flow

0 -$815,000

1 $141,000

2 $320,000

3 $440,000

What is this project's internal rate of return?

If the discount rate is 1%, what is this project's net present value?

If the discount rate is 4%, what is this project's net present value?

If the discount rate is 10%, what is this project's net present value?

If the discount rate is 18%, what is this project's net present value?