1. Adjust the life of Proposal A to a time period that is eipual to that of Proposal B by estionating a residual value at the end of Year 5 , b. ignore the usehul lives of 5 and 8 years and compute the averige rate of refurn. c. Ignore the useful twes of 5 and 8 vears and find an average (6y. years). 4. Tanare the fact that Proposal A has a useful life of 5 years and treat it as if it has a useful life of s yearse