Required informetion PEMEX, Mexico's petroleum corporation, has an estimated budget for oil and gas exploration that includes equipment for three offshore platforms as shown. Use PW analysis to select the best alternative at a MARR of 10\% per year. Select platform X,Y, or Z using tabulated factors. The present worth of platform X is S million, the present worth of plotform Y is $ million, and the present worth of platform Z is \$- million. The platform selected based on the present worth is