X~N(70, 12). Suppose that you form random samples of 25 from this distribution. Let X be the random variable of averages. Let EX be the random variable of sums. E Part (a) E Part (b) O Part (c) O Part (d) Find the 30th percentile. (Round your answer to two decimal places.) A Part (e) Sketch the graph, shade the region, label and scale the horizontal axis for X, and find the probability. (Round your answer to four decimal places.) P(68 < X < 74) =| O Part (f) Sketch the graph, shade the region, label and scale the horizontal axis for X, and find the probability. (Round your answer to four decimal places.) P(35 < X < 67) =| O Part (g) Give the distribution of EX. A Part (h) Find the minimum value for the upper quartile for EX. (Round your answer to two decimal places.) O Part (i) Sketch the graph, shade the region, label and scale the horizontal axis for EX, and find the probability. (Round your answer to four decimal places.) P(1700 < EX < 1850) =|