can someone please explain with formulas and all work shown? i rate! :)

A project has an operating cash flow of $33,000. Initially, this 4-year project required $5,600 in net working capital, which is recoverable when the project ends. The firm also spent $16,400 on equipment to start the project. This equipment will have a book value of $2,800 at the end of year 4. What is the cash flow for year 4 of the project if the equipment can be sold for $4,500 and the tax rate is 35 percent? A project has an initial requirement of $310,000 for fixed assets and $62,000 for net working capital. The fixed assets will be depreciated to a zero book value over the 3- year life of the project and have an estimated salvage value of $155,000. All of the net working capital will be recouped at the end of the project. The annual operating cash flow is $345,000 and the discount rate is 18 percent. What is the project's net present value if the tax rate is 34 percent