7. Jakob Corporation has the following information pertaining to the purchase of a new piece of equipment: Cash revenues less cash expenses $55,000 per year Cost of equipment Salvage value at the end of the 10th year Increase in working capital requirements $190,000 $25,000 $30,000 Tax rate Life 40 percent 10 years Cost of capital is 15 percent. Required (use excel): b. Calculate the following assuming that depreciation expense is $30,000, $27,000, $24,000, $21,000, $18,000, $15,000, $12,000, $9,000, $6,000 and $3,000 for years 1 through 10, respectively: i. Calculate the after-tax cash flows for each of the ten years. ii. Calculate the after-tax payback period. iii. Calculate the net present value (NPV). iv. Calculate the internal rate of return (IRR)