The weight of an organ in adult males has a bell-shaped distribution with a mean of 340 grams and a standard deviation of 20 grams. Use the empirical rule to determine the following. (a) About 99.7% of organs will be between what weights? (b) What percentage of organs weighs between 300 grams and 380 grams? (c) What percentage of organs weighs less than 300 grams or more than 380 grams? (d) What percentage of organs weighs between 280 grams and 380 grams? (a) and grams (Use ascending order.)