Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 1094 and x = 584 who said "yes." Use a 99% confidence level. Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. 534 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. (Round to three decimal places as needed.)