For the following table, assume a MARR of 15% per year and a useful life for each alternative of eight years which equals the study period. The rank-order of alternatives from least capital investment to greatest capital investment is Z †’ Y †’ W †’ X. Complete the incremental analysis by selecting the preferred alternative. €œDo nothing€ is not an option.

(a) Alternative W

(b) Alternative X

(c) Alternative Y

(d) Alternative Z

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Y- w W- X Z- Y A Capital -$550 -$250 -$400 investment A Annual cost savings A Market 70 90 15 100 50 200 value A PW(15%) 97 20 ???