6.(10) The results on a standardized exam are approximately normally distributed. If the average on the test is 70 with a standard deviation of 9.5, what is the probability that a randomly selected exam has a score higher than 75? 7.(10) If IQ scores are normally distributed with a mean of 100 and standard deviation of 13, what does your IQ have to be so that you were in the 99" percentile. 8. (10) An experiment consists of tossing a coin 10,000 times. Let X be the number of tails. Find P(X