7. Forecasting demand is a challenge to inventory management. When would forecasting be easier to do and when would it be harder to do? Describe two of the many statistical ways to do demand forecasting. 8. What does the term "safety stock mean in inventory management? How can it help is delivering quality customer service? Why can it be a bad thing to a company? 9. When placing orders for inventory, there are two options available. They are "variable time ordering" and "fixed time ordering. What is the difference between the two? 10.In your own words, what are the challenges to managing inventory levels