find a,b,c,d and e

Spherical Manufacturing recently spent $12 million to purchase some equipment used in the manufacture of disk drives. This equipment has a CCA rate of 45% and Spherical's marginal corporate tax rate is 34%. a. What are the annual CCA deductions associated with this oquipment for the first five years? b. What are the annual CCA tax shields for the first five years? c. What is the present value of the first five CCA tax shields if the appropriate discount rate is 12% per year? d. What is the present value of all the CCA tax shields assuming the equiment is nover sold and the appropriate discount rate is 12% per year? e. How might your answer to part (d) change if Spherical anticipates that its marginal corporate tax rate will increase substantially over the next five years