The weight of an organ in adult males has a​ bell-shaped distribution with a mean of grams and a standard deviation of grams. Use the empirical rule to determine the following.
​(a) About ​% of organs will be between what​ weights?
​(b) What percentage of organs weighs between grams and ​grams?
​(c) What percentage of organs weighs less than grams or more than ​grams?
​(d) What percentage of organs weighs between grams and ​grams?