According to the National Health Statistics Report Number 122, December 20, 2018

(Fryar, 2018), the estimated mean weight of an adult male in the United States is 197.8 pounds. Suppose the distribution of weights of adult males in the US is normally distributed with mean weight ???? = 200 pounds with standard deviation of

???? = 25 pounds. Determine the

(a) probability that an adult male in the US weighs more than 240 pounds.

(b) probability that an adult male in the US weighs less than 140 pounds.

(c) probability that an adult male in the US weighs between 180 and 220 pounds.

(d) 90th percentile of the weights of adult males in the US.