Please answer all three (3) discussion questions. DQ3 is associated with your paper; it asks about the metrics you intend to use to support your thesis. Use the concepts and terminology discussed in the book. Answer the discussion questions in at least 400 words with good content demonstrating your knowledge of the topic. Respond to student and instructor comments. Based off of McDonalds customer satisfaction and food safety Q1 Define inventory and discuss why inventories are maintained. What are the Inventory Models you learned in chapter 11? Q2 What is the difference between yield management and revenue management for service-based organizations? Q3 How can service companies carry labor inventory?