for IRR were done for different lifespans for Z1 (10 years) and Z2 (7 years). Redo the

Question:

for IRR were done for different lifespans for Z1 (10 years) and Z2 (7 years). Redo the calculations for IRR assuming Z1 is renewed once (20-year lifespan) and Z2 is renewed twice (21-year lifespan). Do the IRR values change? Does the conclusion change as to which is the preferred alternative via IRR?

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