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=1016 and x=577 who said​ "yes." Use a 99% confidence level.     ​a) Find the best point estimate of the population proportion p.   ​(Round to three decimal places as​ needed.)   ​b) Identify the value of the margin of error E.   E= ​(Round to three decimal places as​ needed.)   ​c) Construct the confidence interval.   __

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