ABC Corporation is evaluating a project requiring an initial investment of $500,000. The expected net inflows are as follows:

Year	Net Inflow
1	$100,000
2	$120,000
3	$150,000
4	$130,000
5	$180,000

Requirements:

1. Calculate the Accounting Rate of Return (ARR).
2. Determine the Payback Period.
3. Compute the Net Present Value (NPV) assuming a discount rate of 8%.
4. Calculate the Internal Rate of Return (IRR).