Number 2. Provide step by step explanation please .

kercises: 1. A researcher wants to determine the average and the standard deviation of the daily mortality rate of COVID 19. Result of his research shows that out of 50 randomly selected days, the daily mortality rate has a mean of 11 deaths with a standard deviation of 1.1. Construct a .96 confidence interval estimate of the true standard deviation and the true average number of deaths from COVID 19. 2. In 15 test runs, a car runs for 16, 19, 12, 15, 14, 14, 17, 15, 18, 15, 12, 19, 14, 15 & 14 kilometers for every one liter of gasoline. Construct a 0.95 confidence interval estimate of the true average distance and the true standard deviation run by this car for every liter of gasoline. 3. Survey result shows that out of 100 people interviewed, 81 say that they are satisfied with the government efforts in containing the pandemic. Construct a 0.92 confidence interval estimate of the true proportion of people who are satisfied with the government effort in containing the pandemic