Update my answer to Exercise 2.37.

Included are the following 4 files:

	Exercise_2.37.pdf
	Exercise_2.37.scm
	Exercise_2.37.tm
	Test_for_Exercise_2.37.scm

Thank you!
							Lawrence X. Amlord
							  Nov 16th, 2013
							  Xi'an, China
Update my answer to Exercise 2.38.

Modified are the following 4 files:

	Exercise_2.38.pdf
	Exercise_2.38.scm
	Exercise_2.38.tm
	Test_for_Exercise_2.38.scm

Thank you!
							Lawrence X. Amlord
							  Nov 17th, 2013
							  Xi'an, China