Some IQ tests are standardized to a Normal model N (100,16). a) What cutoff value bounds the highest 10% of all IQs? b) What cutoff value bounds the lowest 30% of the IQs? c) What cutoff values bound the middle 60% of the IQs? d) What cutoff value bounds the lowest 85% of the IQs? a) The cutoff value is (Round to one decimal place as needed.)