A livestock company reports that the mean weight of a group of young steers is 1172pounds with a standard deviation of 70pounds. Based on the model N(1172,70)for the weights of steers, what percent of...

A livestock company reports that the mean weight of a group of young steers is 1172pounds with a standard deviation of 70pounds. Based on the model N(1172,70)for the weights of steers, what percent of steers weigha) over 1100pounds?b) under 1250pounds?c) between 1200 and 1300 pounds?