The weight of an organ in adult males has a bell-shaped distribution with a mean of 330 grams and a standard deviation of 50 grams. Use the empirical rule to determine the following. (a) About 95% of organs will be between what weights? (b) What percentage of organs weighs between 280 grams and 380 grams? (c) What percentage of organs weighs less than 280 grams or more than 380 grams? (d) What percentage of organs weighs between 180 grams and 430 grams? (a) nothing and nothing grams (Use ascending order.)