Stephens, Inc. is considering investing in one of two machines designed to reduce costs (the projects are mutually exclusive). Machine A costs $90,000 and machine B costs $150,000. Both machines have a useful life of three years and no salvage value. Stephens, Inc. has a tax rate of 20% and uses straight-line depreciation. Machine A will result in before-tax cost savings of $40,000, 50,000 and 60,000 in years 1, 2 and 3, respectively. Machine B will result in before-tax cost savings of $80,000, 80,000 and 60,000 in years 1, 2 and 3, respectively. What are the relevant cash flows for each of the machines in years 0, 1, 2 and 3? What are the IRRs for each project? What are the NPVs of each project at a 5% discount rate? What are the NPVs of each project at a 10% discount rate? At what discount rate would I be indifferent between the two projects and what is the NPV of the projects at this discount rate?

PLEASE show me how to get the cash flows, and the IRRS and NPV and what the question is asking else.

I have no idea how to do this.

please help!

thanks