The numbers of simultaneous users of a social media website are normally distributed with a population standard deviation of 0.8 thousand users and an unknown population mean. If a random sample of 42 simultaneous times is taken and results in a sample mean of 5.2 thousand users, find a 99 % confidence interval for the population mean. Use the tool below to calculate your confidence interval. Choose the correct confidence level, sample mean, population standard deviation, and sample size. Then view the confidence interval indicated on the x-axis to find your answer. Please note, you'll need to use the sliders above the graph to change the x-axis markers. Round your answers to 2 decimal places