Points: 0 of 1 A survey of 200 middle managers showed a distribution of the number of hours of exercise they participated in per week with a mean of 3.68 hours and a standard deviation of 4.92 hours. Complete parts (a) through (c) below. a) According to the Normal model, what percent of managers will exercise fewer than one standard deviation below the mean number of hours? % (Round to the nearest whole number as needed.)