Add the problem 1.17.

Included is the following file:

	Exercise_1.17.tm

Thank you!
							Lawrence X. Amlord
							  Nov 27th, 2013
							  Xi'an, China
Add the problem 1.14.

Included is the following file:

	Exercise_1.14.tm

Thank you!
							Lawrence X. Amlord
							  Nov 29th, 2013
							  Xi'an, China
Add the problem 1.16.

Included is the following file:

	Exercise_1.16.tm

Thank you!
							Lawrence X. Amlord
							  Nov 29th, 2013
							  Xi'an, China