A mining company invests $10,000 in equipment that will result in a $3,000 annual revenue stream for 8 years. Annual expenses are $700, salvage $500 after 8 years and the MARR 9% . The corporation expects to pay 53% of its revenue in income tax. What is 3. a) The before-tax present worth? b) Calculate the SLD deprecation schedule c) Calculate the SOYD deprecation schedule d) Calculate the DDB deprecation schedule e) Calculate the MACRS deprecation schedule