Add my answer to Exercise 3.53.

Included are the following 2 files:

	Exercise_3.53.pdf
	Exercise_3.53.tm

Thank you!
							Lawrence X. Amlord
							  Nov 23rd, 2013
							  Xi'an, China
Add my answer to Exercise 3.54.

Included are the following 4 files:

	Exercise_3.54.pdf
	Exercise_3.54.scm
	Exercise_3.54.tm
	Test_for_Exercise_3.54.scm

Thank you!
							Lawrence X. Amlord
							  Nov 24th, 2013
							  Xi'an, China