The letters w, x, y, and z each represent a different positive integer greater than 3. If we know that
1 /w − 3
=
1 /x + 1
=
1 /y + 2
=
1 /z − 2 .

Write w, x, y, and z in order from the letter that represents the smallest integer to the
letter that represents the largest integer.

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th 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 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?