Add my answer to Problem 5 in Project 1.

Included are the following 2 files:

	Problem_5.scm
	Test_for_Problem_5.scm

Thank you!
							Lawrence R. Amlord
							   May 20th, 2013
							   Xi'an, China
Update Twenty-one_Simulator in Project 1.
Add my answer to Problem 6 in Project 1.

Included are the following 2 files:

	Problem_6.scm
	Test_for_Problem_6.scm

Thank you!
							Lawrence R. Amlord
							   May 20th, 2013
							   Xi'an, China