Update my answer to Exercise 3.43.

Updated are the following 2 files:

	Exercise_3.43.pdf
	Exercise_3.43.tm

Thank you!
							Lawrence X. Amlord
							  Nov 4th, 2013
							  Xi'an, China
Add my answer to Exercise 3.44.

Included are the following 2 files:

	Exercise_3.44.pdf
	Exercise_3.44.tm

Thank you!
							Lawrence X. Amlord
							  Nov 4th, 2013
							  Xi'an, China