Update my answer to Subproblem b in Exercise 2.96.

Modified is the following file:

	Exercise_2.96-b.scm

Thank you!
							Lawrence R. Amlord
							   Aug 26th, 2013
							   Xi'an, China
Add my answer to Subproblem a in Exercise 2.97.

Included are the following 2 files:

	Exercise_2.97-a.scm
	Test_of_Exercise_2.97-a.scm

Thank you!
							Lawrence R. Amlord
							   Aug 26th, 2013
							   Xi'an, China
Add my answer to Subproblem b in Exercise 2.97.

Included are the following 2 files:

	Exercise_2.97-b.scm
	Test_of_Exercise_2.97-b.scm

Thank you!
							Lawrence R. Amlord
							   Aug 26th, 2013
							   Xi'an, China