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5. What is the difference between the payback period and thediscounted payback?6. Define the Average Accounting Return (AAR). What are thedisadvantages of the AAR?7. What is the Internal Rate of Return (IRR)? What is the IRRrule? How is the IRR calculated?8. Do the NPV rules and IRR rules lead to identical investmentdecisions? If so, under what circumstances?