Add my answer to Exercise 1.9.

Included are the following 2 files:

	Exercise_1.9.pdf
	Exercise_1.9.tm

Thank you!
							Lawrence X. Amlord
							  Oct 29th, 2013
							  Xi'an, China
Add my answer to Exercise 1.10.

Included are the following 2 files:

	Exercise_1.10.pdf
	Exercise_1.10.tm

Thank you!
							Lawrence X. Amlord
							  Oct 30th, 2013
							  Xi'an, China
Add my answer to Exercise 1.11.

Included are the following 2 files:

	Exercise_1.11.pdf
	Exercise_1.11.tm

Thank you!
							Lawrence X. Amlord
							  Oct 31st, 2013
							  Xi'an, China