A livestock company reports that the mean weight of a group of young steers is 1156 pounds with a standard deviation of 61 pounds. Based on the model N(1156,61) for the weights of steers, what percent of steers weigh a) over 1250 pounds? b) under 1150 pounds? c) between 1000 and 1100 pounds? a) % of steers have weights above 1250 pounds. (Round to one decimal place as needed.)