A report on thepoultrysite.com stated that the weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams.

a. Find the 22nd percentile of the weights.

b. Find the 93rd percentile of the weights.

c. Find the first quartile of the weights.

d. A chicken farmer wants to provide a money-back guarantee that his broilers will weigh at least a certain amount. What weight should he guarantee so that he will have to give his customers’ money back only 1% of the time?