Exercises for Wednesday October 22 2014

Exercises are 9.18, 9.19, 9.21, 9.22, 9.23, 9.24, 9.25, 9.26, 9.27, 9.28, 9.29, 9.32, 9.34, 9.35, 9.36. The exercises not discussed (due to time) are passed on to Wednesday October 29 2014