Problem 3. Other Inventory Classifications (6 points) Please conduct research on the following 2 inventory classifications: a) XYZ classification b) VED classification For each classification, please do the following: 1. Briefly explain the criteria used in the classification and how the inventory is classified based on the criteria. 2. Point out (brainstorm) the scenarios where the classification should be adopted. Problem 4. ROP Evaluation (3 point) For a given product managed using an (R,Q) model, the reorder point ROP = 1,800 units, the mean demand D= 500 units/month, and the mean lead time L = 2.5 months. How much safety stock is being held? Show detailed work to gain full credit