5. Problem 13.05 (Abandonment Option) The Scampini Supplies Company recently purchased a new delivery truck. The new truck has an after-tax cost of $22,000, and it is expected to generate aftertax cash fiows of $6,500 per year. The truck has a 5 -year expected lfe. The expected year-end abandonment values (after-tax salvage values) for the truck are given below. The company's WACC is 9%. a. What is the trucks optimal economic life? Round your answer to the nearest whole number. year(s) b. Would the introduction of abandonment values, in addition to operating cash fows, ever reduce the expected NPV and/or trR of a project