The Wechsler Adult Intelligence Scale is an IQ test designed to measure cognitive ability and intelligence in adults. The developers of the test strive to standardize the scoring so that the average score for all adults is 100, with a standard deviation of 15. a) If these scores have a normal distribution, what percentage of adults would you expect to score in the range 85 to 115 points? Explain. b) Assume the scores are normally distributed. Your classmate took the test and scored at the 95th percentile. Is her score higher or lower than 130? Explain (and drawing a picture helps! -even if you don't include it in your submitted work)