Microsoft periodically issues a Security Bulletin that reports the software affected by the vulnerability. In a sample of 50 bulletins issued in a recent year, 32 reported a security problem with Microsoft Windows. a. Find a point estimate of the proportion of security bulletins issued that reported a problem with Windows during the year. b. Find an interval estimate for the proportion, part a. Use a 95% confidence interval. c. Practically interpret the confidence interval, part b. Your answer should begin with, "We are 95% confident … ".