13. 9.43 The annual worth values for a defender, which can be replaced with a similar used asset, and a challenger are estimated. The defender should be replaced: 1. Now 2. 1 year from now 3. 2 years from now 4. 3 years from now Table Summary: A table divided into 2 main columns shows a replacement analysis for a 5-year period. The column headers are given as: Column 1, number of years retained; and Column 2, AW in dollars per year is. Column 2 is further divided into two parts: Defender and Challenger. Number ofYears Retained AW Value, $ per Year Defender Challenger 1 −14,000 −21,000 2 −13,700 −18,000 3 −16,900 −13,800 4 −17,000 −15,600 5 −18,000 −17,500