Schadek Silkscreen Printing, Inc., purchases plastic cups on whichto print logos for sporting events, proms, birthdays, and otherspecial occasions. Zack Schadek, the owner, received a largeshipment this morning. To ensure the quality of the shipment, heselected a random sample of 300 cups. He found 15 to be defective. a. What is the estimatedproportion defective in the population?b. Develop a 95 percent confidenceinterval for the proportion defective. c. Zack has an agreement withhis supplier that he is to return lots that are 10 percent or moredefective. Should he return this lot? Explain your decision.