9. Corin sells Sunday papers outside a retirement home on Sunday mornings. Corin collects $1.58 per paper and pays $1.16 for a paper. The retirement home residents think fondly of Corin and aren't too upset when papers run out. On the other hand, any papers Corin is left with are thrown into the recycling bin. Corin is trying to figure out a systematic ordering policy. When Corin runs out of papers, the sale is lost. Calculate the service level. (two decimal places, 0.00)

10. Corin sells Sunday papers outside a retirement home on Sunday mornings. Corin collects $3.00 per paper and pays $1.20 for a paper. The retirement home residents think fondly of Corin and aren't too upset when papers run out. On the other hand, any papers Corin is left with are thrown into the recycling bin. Corin is trying to figure out a systematic ordering policy. When Corin runs out of papers, the sale is lost. Demand is uniformly distributed between 11 and 58 newspapers per day. Calculate the optimal stocking. (round off to the nearest whole number)

11. A local industrial plant produces plastic containers for use in the food packaging industry. Last year, its average monthly production was 20,000 containers produced using one shift five days a week with an eight-hour-a-day operation. Of the items produced, 35% were deemed defective. The 35% defective containers are scrapped due to quality problems that are identified after they have completed the production process. Recently, the plant has implemented new production methods and a new quality improvement program. Its monthly production has increased to 25,000 containers with 13% defective. Calculate the percentage change in productivity (%). (Please answer to two decimal places).