The weight оf а humаn heаrt is adults males has a bell-shaped distributiоn with a mean оf 300 grams and a standard deviation of 35 grams. Use the empirical rule to determine the following. Write your answers in full sentences and use the appropriate units. a. About 68% of adult male human hearts will weigh between what weights? b. What percentage of human hearts weigh less than 230 grams? c. What percentage of human hearts weigh between 230 grams and 405 grams?