in detail don't use Excel

6. If an investment is expected to increase revenues by 5100,000 per year for five years, with no effoct on expenses or working capital, what is the operating cash flow per year if depreciation is 520,000 each year and the tax rate is (a) 205 ? ? (b) 3098 ? (c) 40% ? (d) 50 ?se? 7. The Gomex, Mustache Wax Company is evaluating the purchase of a new wax-moldiag machine. The machine costs $100.000 and has a useful life of five years. How do the cash flows differ when straight-line is used instead of MACRS deprociation for tax purposes, assuming a tax rate of 40% and no salvage value