Weights ( X ) of men in a certain age group have a normal distribution with mean ? = 170 pounds and standard deviation ? = 28 pounds. Find each of the following probabilities. (Round all answers to...

(a)P(X ≤ 191) = probability the weight of a randomly selected man is less than or equal to 191 pounds.



(b)P(X ≤ 156) = probability the weight of a randomly selected man is less than or equal to 156 pounds.



(c)P(X
> 156) = probability the weight of a randomly selected man is more than 156 pounds