An engineering company just bought a milling machine for $75,000. Its service life is 15 years, an afterwards its salvage value will be $2000. Services provided by the machine are expected to brin $10,000 in annual revenues, and operating costs are estimated at $2500 per year. Assume that th CCA rate is rate is 30%. Calculate the depreciation rate of this machine as well as the after-tax present worth of this investment. (20 marks) equal to the depreciation rate, the after-tax interest rate is 5% and the corporate tax