The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1263 chips and a standard deviation of 118 chips. (a) determine the 27th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 98% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?