Can anyone help me with this?

1. You are considering an investment project that requires an initial outlay of $50,000 and will generate net cash flows of $20.000 a year for the next 4 years. The salvage value after 4 years is zero. The cost of capital is 10% a year. a) Compute the net present value (NPV) of the project. Should you invest? b) Compute the payback period. Should you use the payback method in real life? c) Compute the accounting rate of return (ARR). Should you use ARR in real life