A University student painter is considering the purchase of a new paint gun, which would have a useful life of 4 years, at which time it can be sold for $1,200. the paint gun belongs to Class 9, which has a 25 % CCA rate. the tax rate is 22% and the required return is 16%. Calculate the PV of the tax shield on the CCA for the paint gun. Provide as much detail as possible I need to know how to do this. Please respond ASAP