Accounting Rate of Return, please dont just give me an answer

Each of the following scenarios is independent. Assume that all cash flows are after-tax cash flows a. Cobre Company is considering the purchase of new equipment that will speed up the process for extracting copper. The equipment will cost $3,600,000 and have a life of 5 years with no expected salvage value. The expected cash flows associated with the project are as follows: Year Cash Revenues $6,000,000 6,000,000 6,000,000 6,000,000 6,000,000 Cash Expenses $4,800,000 4,800,000 4,800,000 4,800,000 4,800,000 2 4 b. Emily Hansen is considering investing in one of the following two projects. Either project will require an investment of $75,000. The expected cash revenues minus cash expenses for the two projects follow. Assume each project is depreciable Year Project A $22,500 30,000 45,000 75,000 75,000 Project B $22,500 30,000 45,000 22,500 22,500 2 4