A pump has failed in a facility that will be completely replaced in three years. A brass pump costing $6,000 installed will last three years. However, a used stainless-steel pump that should last three more years has been sitting in the maintenance shop for a year. The pump cost $13,000 when it was new. The accountants say the pump is now worth $7,000. The maintenance supervisor says that it will cost an extra $500 to reconfigure the pump for the new use, or that he could sell it used (as is) for $4,000. (a) What is the net benefit or net cost of installing the stainless-steel pump? Of installing the brass pump? (b) Which option is better? (c) What is the opportunity cost for this set of options? (d) How much cheaper or more expensive would it be to use the stainless-steel pump rather than a new brass pump