Consider the following probability distribution. Complete parts a through d. x 2 4 9 p(x) 1/4 1/4 1/2 Question content area bottom Part 1 a. Calculate = for this distribution. enter your response here (Round to the nearest hundredth as needed.) b. Find the sampling distribution of the sample mean x for a random sample of n=3 measurements from this distribution. Put the answers in ascending order for x. x enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here 99 p(x) enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here enter your response here x 2 4 9 p(x) 1/4 1/4 1/2.