4-. An engineer has received two bids for an elevator to be installed in a new building. The bids, plus his evaluation of the elevators, are as follows: Alternative Bids Installed Service Life Annual 0&M [$] Salvage Value {$) Cost ($] [year] Westin home 45,000 10 2,700 3,000 The engineer will make a present worth analysis using a 10% interest rate. Prepare the analysis and determine which bid should be accepted