The following random sample of size 20 is from a normal distribution.7.12 9.43 6.92 6.06 5.44 3.03 5.85 4.04 4.05 2.995.55 6.01 3.52 3.25 4.73 4.59 4.87 4.44 3.95 5.25Note) Σxi = 101.09 and Σ xi^2 = 558.8025(a) Find the estimates of the mean and standard deviation of the population.(b) Find an interval containing about 95% of the data.(c) Find a 95% confidence interval of the population mean.