Update my answer to Exercise 1.13.

Update are the following 2 files:

	Exercise_1.13.pdf
	Exercise_1.13.tm

Thank you!
							Lawrence X. Amlord
							  Nov 10th, 2013
							  Xi'an, China
Update my answer to Exercise 2.19.

Modified are the following 4 files:

	Exercise_2.19.pdf
	Exercise_2.19.scm
	Exercise_2.19.tm
	Test_for_Exercise_2.19.scm

Thank you!
							Lawrence X. Amlord
							  Nov 11th, 2013
							  Xi'an, China
Update my answer to Exercise 2.20.

Modified are the following 4 files:

	Exercise_2.20.pdf
	Exercise_2.20.scm
	Exercise_2.20.tm
	Test_for_Exercise_2.20.scm

Thank you!
							Lawrence X. Amlord
							  Nov 11th, 2013
							  Xi'an, China
Update my answer to Exercise 2.20.

Modified are the following 2 files:

	Exercise_2.20.pdf
	Exercise_2.20.tm

Thank you!
							Lawrence X. Amlord
							  Nov 11th, 2013
							  Xi'an, China
Add code in section 2.2.1.

Included is the following file:

	2.2.1_Representing_Sequences.scm

Thank you!
							Lawrence X. Amlord
							  Nov 11th, 2013
							  Xi'an, China
Update my answer to Exercise 2.21.

Modified are the following 2 files:

	Exercise_2.21.pdf
	Exercise_2.21.tm

Additional file provided is:

	Exercise_2.21.scm

Thank you!
							Lawrence X. Amlord
							  Nov 12th, 2013
							  Xi'an, China
Update my answer to Exercise 2.22.

Modified are the following 4 files:

	Exercise_2.22.pdf
	Exercise_2.22.scm
	Exercise_2.22.tm
	Test_for_Exercise_2.22.scm

Thank you!
							Lawrence X. Amlord
							  Nov 12th, 2013
							  Xi'an, China
Update my answer to Exercise 2.23.

Modified are the following 2 files:

	Exercise_2.23.scm
	Test_for_Exercise_2.23.scm

Besides, I've eliminated the following 2 files

	Exercise_2.23.pdf
	Exercise_2.23.tm

for the contents inside was overlapping with the Scheme source file.

Thank you!
							Lawrence X. Amlord
							  Nov 12th, 2013
							  Xi'an, China
Update my answer to Exercise 2.24.

This is a major release! It corrects the wrong solution in its predecessor.

Modified are the following 3 files:

	Exercise_2.24.pdf
	Exercise_2.24.scm
	Exercise_2.24.tm

Thank you!
							Lawrence X. Amlord
							  Nov 12th, 2013
							  Xi'an, China
Update my answer to Exercise 2.25.

Modified are the following 3 files:

	Exercise_2.25.pdf
	Exercise_2.25.scm
	Exercise_2.25.tm

Thank you!
							Lawrence X. Amlord
							  Nov 12th, 2013
							  Xi'an, China