The weights of NCAA lacrosse players are approximately normally distributed with a mean of 182 lbs and a standard deviation of 13.1 lbs.

. a) Find the probability that a player will have a weight between 163 lbs and 191 lbs. (6 points)

. b) How much would a lacrosse player weigh if he was lighter than 75% of the other players? (5 points)

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