This is in Statistics. Solve the problem below.

4. {20 points) A population consists of ve numbers 3, 8, 9, l4, and 18. Consider all possible samples of size two which can be drawn with replacement from this population. Find (a) the mean of the population, (b) the standard deviation of the population, (c) the mean of the sampling distribution of means, (d) the standard deviation of the sampling distribution of means, i.e., the standard error of means