Space Fuel Inc., is considering two mutually exclusive alternatives, given details below in Space Ferderation Dollars (SFD), as part of a propellant production facility on Mars. This facility will allow for ships to return to Earth. The alternatives are:

its just one question, only need help with a and d

Item Adam Facility Drax Facility 1st Cost [SFD $] 3M Annual Operating Costs 150 K I IM 250K 1 250k/ vears 250kw 250 100k/4 Maintenance [SFD $] Salvage [SFD $ look/4 years 800K 8 Life [years] Chief of the SFF tells you to evaluate the alternatives using Present Worth analysis. a. Drax PW is $_ , Drax d. Adam PW is $_ K, Adam b. Drax PW is Drax e. Adam PW is $ K, Adam c. Drax PW is Drax f. Adam PW is KAdam Item Adam Facility Drax Facility 1st Cost [SFD $] 3M Annual Operating Costs 150 K I IM 250K 1 250k/ vears 250kw 250 100k/4 Maintenance [SFD $] Salvage [SFD $ look/4 years 800K 8 Life [years] Chief of the SFF tells you to evaluate the alternatives using Present Worth analysis. a. Drax PW is $_ , Drax d. Adam PW is $_ K, Adam b. Drax PW is Drax e. Adam PW is $ K, Adam c. Drax PW is Drax f. Adam PW is KAdam