An automobile parts manufacturer has a plant in lowa located along the Missouri river. In 2019, heavy snowfall and frigid temperatures were followed by a late winter storm in midMarch. The combined effect produced heavy flooding along the Missouri River and its tributaries throughout Nebraska and lowa. The plant was heavily damaged. The manufacturer is considering building a retainer wall in stages over the next three years. The plan requires capital investments of: - $50,000 in January of 2024 - $50,000 in January of 2025 - $30,000 in January of 2026 The magnitude of the flooding risk liability has been measured from the perspective of "before investment and action" (i.e., without building the retainer wall), and the perspective of "after investment and action" (i.e., building the retainer wall including the cost of the wall). These have been measured as: - Expected Value NPV Before Mitigation =$10,000,000 - Expected Value NPV After Mitigation =$6,000,000 Assuming a corporate discount rate of 6.0%, what is the investment productivity of building th retainer wall? Should the company invest in the retainer wall