pls help with hw question

The weight of an organ in adult males has a bell-shaped distribution with a mean of 310 grams and a standard deviation of 25 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 285 grams and 335 grams? (c) What percentage of organs weighs less than 285 grams or more than 335 grams? its (d) What percentage of organs weighs between 285 grams and 385 grams? (a) and grams (Use ascending order.) (b) % (Type an integer or a decimal.) ary (c) % ( Type an integer or a decimal.) (d) % (Type an integer or decimal rounded to two decimal places as needed.)