4. An engineer is considering two robots for purchase by a fiber-optic manufacturing company. Robot X will have a first cost of $85,000, an annual maintenance and operation cost of $30,000, and a $40,000 salvage value. Robot Y will have a first cost of $97,000, an annual maintenance and operation cost of $27,000, and a $48,000 salvage value. Which should be selected on the basis of an annual worth comparison at an interest rate of 12% per year? Use a 3-year study period