6.A random sample of 60 married couples who have been married 7 years was ask the number of children they have. You may assume requirements are satisfied. The results of the survey are as follow00033313223132403331023314231 3350230442232222343221432421232a. What is the shape of the distribution of the sample mean? Why?b. Compute a 95% confidence interval for the mean number of children of all couples who have been married for 7 years. Interpret the interval. c.Computer the 99% confidence interval for the mean number of childrenof all couples who have been married 7 years. Interpret the interval.