please answer 2 questions

QUESTION 15 A retailer manages the inventory based on a periodic review system with a review period = 5 days and the order-up-to level = 80 units. The retailer can place an order today, and the current on-hand inventory = 0 units, on-order inventory = 40 units, and the backorder = 20 units. What is the quantity for this order? 60 20 OOOO gage 80 40 QUESTION 16 Which of the following statements about the EOQ model is NOT correct? If the unit fixed ordering cost increases, the optimal order quantity increases, and the optimal ordering + holding cost increases. If the annual inventory holding cost rate increases, the optimal order quantity decreases, and the optimal ordering + holding cost decreases If the annual demand increases, the optimal order quantity increases, and the optimal ordering + holding cost increases. If the unit purchasing cost increases, the optimal order quantity decreases, and the optimal ordering + holding cost increases