4. The Stanford-Binet IQ test is scored according to a bell-shaped curve with a mean of 100 and a standard deviation of 15. (a) What percent of individuals have an IQ between 55 and 130? (b) What percent of individuals have an IQ between 115 and 130? (c) Psychologists classify an individual as having cognitive delays if he/she falls into the lowest 16% of IQ scores. What is the cutoff for this classification? (d) An individual is classified as a genius if his/her IQ is in the top 0.15% of IQ scores. What is the cutoff for this classification? 5. The lengths of krayt dragons follow a skewed-right distribution with a mean of 44.87 m with a standard deviation of 12.21 m. (a) What percent of krayt dragons are between 8.24 m and 69.29 m in length? (b) What is cutoff for the heaviest 0.15% of krayt dragons