Solve the following system of equations for all three variables. 3x+2y-z=
3x+2y−z=
\,\,3
3
-x+4y-z=
−x+4y−z=
\,\,-7
−7
-9x-3y+z=
−9x−3y+z=
\,\,-6
−6

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?