I fon't understand how to work question 13. question 11 contains information i believe to solve question 13

Now suppose the retailer pays back each unsold newspaper to you. What would be the optimal payback rate at which the supply chain profit is maximized? Please subrnit your complete worked out answers. Suppose you are a newspaper supplier. It costs you $0.40 to produce a newspaper. You sell each newspaper at $0.8 to a retailer, and the retail sells each newspaper to its customers for $1.2. You are responsible for making production quantity decision and the retailer will buy all th production units from you. All the unsold newspaper will be returned to you and you refund them to the retailer. If you want to maximize your ow profits, what should be the optimal service level? 0.4 0.3 0.5 0.66 Now suppose the retailer pays back each unsold newspaper to you. What would be the optimal payback rate at which the supply chain profit is maximized? Please subrnit your complete worked out answers. Suppose you are a newspaper supplier. It costs you $0.40 to produce a newspaper. You sell each newspaper at $0.8 to a retailer, and the retail sells each newspaper to its customers for $1.2. You are responsible for making production quantity decision and the retailer will buy all th production units from you. All the unsold newspaper will be returned to you and you refund them to the retailer. If you want to maximize your ow profits, what should be the optimal service level? 0.4 0.3 0.5 0.66