please provide answer for 4,5,6,7,8,9 only

Demand lor jelly doughnuts on Saturdays at Don's Doughnut Shoppo is shown in the following table. Labor, materials, and overhead are estimated to be $3.20 per dozen, doughnuts are sold for $4.80 per docen, and leftover doughnuts at the end of each day are sold the next day at haif price. What is the underage cost per doten of doughnuts? $1.6 $4.8 $32 50.4 QUESTION 2 What is the overerage cost per dozen of doughnuls? 548 50.6 $32 $0.8 What is the optimal service level? 0.230.420.670.82 QUESTION 4 Determin the demand distribution using the relative frequency column by filling in the blarks. Based on the optimal service level and the demand distribution, what is the optimal number of doughnuts in dorens to stock? 24 25 26 27 QUESTION 6 During the Final Four, the demand for basketball jerseys is normally distntuted with mean 1,000 and standard deviation 300 . Each jersoy costs $30. The selling price is $40 per jersey. What is the underage cost? $10 $30 $0.25 $300 QUESTION 7 What is the overage cost? 510 $30 $0.25 $300 What is the optimal service level and the optimal number of jerseys to stock? 0.3,8750.25,797.50.3,797.50.25,875 QUESTION 9 If the unsold jerseys can be sold off at half price. How many jerseys should be ordered? 875 900 950 1000 QUESTION 10 In a supply chain with one supplier and one retaler, if the retailer agrees to "pay-back" for unsold inventory, then this payback contract helps coordinate the supply chain by reducing supplier's safety stock overage cost service level underage cost