18. The distribution ages for students at the state college is positively skewed with a mean of u= 21.5 and a standard deviation of o= 3. a. What is the probability of selecting a random sample of n = 4 students with an average age greater than 23? (Careful: This is a trick question.) b. What is the probability of selecting a random sample of n = 36 students with an average age greater than 23? c. For a sample of n = 36 students, what is the probability that the average age is between 21 and 22? 20 Jumbo shrimp are those that require 10 to 15 shrimp to make a pound. Suppose that the number of jumbo shrimp in a one-pound bag averages u = 12.5 with a standard deviation of o = 1, and forms a normal distribution. What is the probability of randomly picking a sample of n - 25 one-pound bags that average more than M = 13 shrimp per bag