add solution to Problem 6-1.

Included are the following 2 files:

	6-1.pdf
	6-1.tm

Thank you!
							Lawrence X. Amlord
							  Jun 25th, 2014
							  Xi'an, China
add manuscript to solution to Problem 6-2.

Included is the following file:

	6-2.tm

Thank you!
							Lawrence X. Amlord
							  Jun 26th, 2014
							  Xi'an, China