Suppose that we will take a random sample of size n from a population having mean , and standard deviation o For each of the following situations, find the mean, variance, and standard deviation of the sampling distribution of the sample mean * : (a) = 18, 0= 2, n= 22 (Round your answers of "g , " and "a : "to 4 decimal places.) UT (b) = 494. = .3, n= 125 (Round your answers of "o , " and " ; " to 4 decimal places.}