Add my answer to Exercise 2.64.

Included are the following 4 files:

	Exercise_2.64.pdf
	Exercise_2.64.scm
	Exercise_2.64.tm
	Test_of_Exercise_2.64.scm

Thank you!
							Lawrence R. Amlord
							   Jul 23rd, 2013
							   Xi'an, China
Update my answer to Exercise 2.63.

Modified are the following 2 files:

	Exercise_2.63.pdf
	Exercise_2.63.tm

Thank you!
							Lawrence R. Amlord
							   Jul 23rd, 2013
							   Xi'an, China
Add my answer to Exercise 2.65.

Included are the following 4 files:

	Exercise_2.65.pdf
	Exercise_2.65.scm
	Exercise_2.65.tm
	Test_of_Exercise_2.65.scm

Thank you!
							Lawrence R. Amlord
							   Jul 23rd, 2013
							   Xi'an, China
Add my answer to Exercise 2.66.

Included are the following file:

	Exercise_2.66.scm

Thank you!
							Lawrence R. Amlord
							   Jul 23rd, 2013
							   Xi'an, China