Can someone explain to me how to get these answers? really struggling on homework and want to understand it. Thanks so much!

Lory runs a local pet shop called Paws R Us. She has been running into some inventory problems and decided to seek your help in better managing her ordering schedule. She provides with you her sales data as well as some cost figures. From the sales data, you estimate that Paws R Us sells 63 Kong toys a week on average with a standard deviation of 8. The average delivery time for a shipment is 0.1 weeks with a standard deviation of 0.084 weeks. Lory faces a per order cost of $15 and an inventory holding cost of $3.90 per toy per week 1. What is the economic order quantity? 2. What is the safety stock and reorder point? 3. What are weekly cycle inventory holding costs, safety inventory holding costs, and ordering costs? What is the weekly total costs? 4. Lory decides to look around for a more reliable delivery company. She finds one that is 100% reliable, thus reducing the standard deviation of lead times to Q. How does this change the her safety stock inventory? Provide a distribution requirements planning for the next 6 days for the scenario below: 2 days Store 31 3 days Store 32 RW 2 2day Store 41 DC 3 Store 42 1 day Store 43 Below is the table of information for the individual stores Weekly Demand Store EOQ Store 31 Store 32 Store 41 Store 42 Store 43 7 units 4 units 36 units 29 units 21 units Ending Inventory (Week op 21 units 12 units 80 units 30 units 25 units 12 units 12 units 72 units 36 units 24 units Lory runs a local pet shop called Paws R Us. She has been running into some inventory problems and decided to seek your help in better managing her ordering schedule. She provides with you her sales data as well as some cost figures. From the sales data, you estimate that Paws R Us sells 63 Kong toys a week on average with a standard deviation of 8. The average delivery time for a shipment is 0.1 weeks with a standard deviation of 0.084 weeks. Lory faces a per order cost of $15 and an inventory holding cost of $3.90 per toy per week 1. What is the economic order quantity? 2. What is the safety stock and reorder point? 3. What are weekly cycle inventory holding costs, safety inventory holding costs, and ordering costs? What is the weekly total costs? 4. Lory decides to look around for a more reliable delivery company. She finds one that is 100% reliable, thus reducing the standard deviation of lead times to Q. How does this change the her safety stock inventory? Provide a distribution requirements planning for the next 6 days for the scenario below: 2 days Store 31 3 days Store 32 RW 2 2day Store 41 DC 3 Store 42 1 day Store 43 Below is the table of information for the individual stores Weekly Demand Store EOQ Store 31 Store 32 Store 41 Store 42 Store 43 7 units 4 units 36 units 29 units 21 units Ending Inventory (Week op 21 units 12 units 80 units 30 units 25 units 12 units 12 units 72 units 36 units 24 units