12-9. Refer to Problem 12-8. Assume the following changes: the study period is eight years; the ski lift will be depreciated by using the MACRS Alternative Depreciation System (ADS); the ADS recovery period is seven years; MARR = 15% per year (after-tax);

and the effective income tax rate (t) is 40%. Based on this information, what is the E(PW) and SD(PW) of the ATCF? Interpret the analysis results and make a recommendation on installing the ski lift. (12.4)