A variable of a population has a mean of p = 74 and a standard deviation of o = 12. a. Identify the sampling distribution of the sample mean for samples of size 36. b. In answering part (a), what assumptions did you make about the distribution of the variable? c. Can you answer part (a) if the sample size is 25 instead of 36? Why or why not? a. What is the shape of the sampling distribution? normal skewed uniform O bimodal What is the mean of the sampling distribution? (Simplify your answer.)