A livestock company reports that the mean weight of a group of young steers is 1171 pounds with a standard deviation of 85 pounds. Based on the model N(1171,85) for the weights ofsteers, what percent of steers weigh

a) over 1150 pounds?

b) under 1100 pounds?

c) between 900 and 1300 pounds?

a) _____ % of steers have weights above 1150 pounds.