Big chickens: According to a poultry industry news website, the weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1417 grams and standard deviation 210 grams. Use the Cumulative Normal Distribution Table to answer the following. (a) What proportion of broilers weigh between 1170 and 1274 grams? (b) What is the probability that a randomly selected broiler weighs more than 1537 grams? (c) Is it unusual for a broiler to weigh more than 1620 grams? Round the answers to at least four decimal places.