A company manufacturing CBS is working on a new technology. A random sample of 670 Internet users were asked: "As you may know, some CDs are being manufactured so that you can only make one copy of the CD after you purchase it. Would you buy a CD with this technology, or would you refuse to buy it even if it was one you would normally buy?" Of these users, 56% responded that they would buy the CD. Complete parts a and b below. a) Create a 95% condence interval for this percentage. (D%.D%) (Round to three decimal places as needed. Use ascending order.)