Exercise 6.8.2 IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X =IQ of an individual. a. X_______(_______,_______) b. Find the probability that the person has an IQ greater than 120. Include a sketch of the graph and write the probability statement. c. Mensa is an organization whose members have the top 2% of all IQs. Find the minimum IQ needed to qualify for the Mensa organization. Sketch the graph and write the probability statement. d. The middle 50% of IQs fall between what two values? Sketch the graph and write the probability statement.