The number of chocolate chips in an 18-ounce bag of Chips Ahoy! chocolate chip cookies is approximately normally distributed, with a mean of 1262 chips and a standard deviation of 118 chips, according to a study by cadets of the U.S. Air Force Academy.

(a) Determine the 29th percentile for the number of chocolate chips in an 18-ounce bag of Chips Ahoy! cookies.

(b) Determine the number of chocolate chips in a bag of Chips Ahoy! that make up the middle 96% of bags.

(c) What is the interquartile range of the number of chips in Chips Ahoy! cookies?