If the company's cost of debt was increased and all other factors were held constant, how would the WACC and NPV be affected? No calculations are necessary.(2 points)

Discuss the impact on the depreciation tax shield and NPV if straight-line depreciation was used instead of the MACRS method and all other factors were held constant. Your answer should include a discussion on how these factors will increase/decrease in the earlier and later years when comparing straight line to MACRS. (2 points)