LMN Ltd. is considering a project that requires an initial investment of $250,000. The project is expected to yield the following returns:

Year	Net Inflow
1	$50,000
2	$60,000
3	$70,000
4	$80,000
5	$90,000

Requirements:

1. Calculate the Accounting Rate of Return (ARR).
2. Compute the Payback Period.
3. Determine the Net Present Value (NPV) with a discount rate of 7%.
4. Calculate the Internal Rate of Return (IRR).

Evaluate the project's viability.