add solution to Exercise 7.1-1.

Included are the following 2 files:

	7.1-1.pdf
	7.1-1.tm

Thank you!
							Lawrence X. Amlord
							  Jul 18th, 2014
							  Xi'an, China
add solution to Exercise 7.1-2.

Included are the following 2 files:

	7.1-2.pdf
	7.1-2.tm

Thank you!
							Lawrence X. Amlord
							  Jul 20th, 2014
							  Xi'an, China
add solution to Exercise 7.1-3.

Included are the following 2 files:

	7.1-3.pdf
	7.1-3.tm

Thank you!
							Lawrence X. Amlord
							  Jul 20th, 2014
							  Xi'an, China
add solution to 7.1-4.

Included are the following file:

	7.1-4.pdf
	7.1-4.tm

Thank you!
							Lawrence X. Amlord
							  Jul 20th, 2014
							  Xi'an, China
add solution to Exercise A.1-1.

Included are the following 2 files:

	A.1-1.pdf
	A.1-1.tm

Thank you!
							Lawrence X. Amlord
							  Jul 20th, 2014
							  Xi'an, China