I just need the first 2 parts completed. Thanks.

Dexcon Technologies, Inc., is evaluating two alternatives to produce its new plastic filament with tribological (i.e., low friction) properties for creating custom bearings for 3-D printers. The estimates associated with each alternative are shown below. Using a MARR of 16% per year, which alternative has the lower present worth? Method First Cost M&O Cost, per Year$-75,000 Salvage Value Life DDM $-130,000 LS $-470,000 $-30,000 $27,000 4 years $4,000 2 years The present worth for the DDM method is $ The present worth for the LS method is S | The | (Click to select) | method is selected