Update my answer to Exercise 1.3.

I have added the solution to the third subproblem.

Newly added is the following file:

	Exercise_1.3.pdf

Additionally, the following file has been modified:

	Exercise_1.3.tm

Thank you!
							Lawrence X. Amlord
							  Oct 18th, 2013
							  Xi'an, China
Add my answer to Exercise 1.4.

Included are the following 2 files:

	Exercise_1.4.pdf
	Exercise_1.4.tm

Thank you!
							Lawrence X. Amlord
							  Oct 18th, 2013
							  Xi'an, China