Update my answer to Exercise 2.33.

Updated are the following 2 files:

	Exercise_2.33.pdf
	Exercise_2.33.tm

Thank you!
							Lawrence R. Amlord
							   Jun 3rd, 2013
							   Xi'an, China
Add 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 R. Amlord
							   Jun 4th, 2013
							   Xi'an, China
Add my answer to Exercise 2.38.

Included 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 R. Amlord
							   Jun 4th, 2013
							   Xi'an, China