In a large population of adults, the mean IQ is 110 with a standard deviation of 17. Suppose 55 adults are randomly selected for a market research campaign. (Round all answers to 4 decimal places, if needed.) (a) The distribution of IQ is approximately normalis exactly normalmay or may not be normalis certainly skewed. (b) The distribution of the sample mean IQ is approximately normalexactly normalnot normalleft-skewedright-skewed with a mean of and a standard deviation of . (c) The probability that the sample mean IQ is less than 109 is . (d) The probability that the sample mean IQ is greater than 109 is . (e) The probability that the sample mean IQ is between 109 and 113 is .