Due: Wednesday, November 24

Please upload your files to CSNS. Note that file uploading will be disabled automatically after 11:59PM of the due date, so please turn in your work on time.

1. (20pt) Textbook Exercise 14.25. Use 2PL as "the lock protocol".

2. (10pt) Textbook Exercise 14.33.

For these exercises, please put your answers in a file in TXT, PDF, DOC, or ODT format and upload it to CSNS.

3. (40pt) Textbook Exercise 14.52(a). For this exercise, you must submit two files:

• A zip file of the SimpleDB project. You can create the zip file using the launch file zip.launch included in the project.
• A document that describes your implementation and how to test it. This document should include a list of files that you added/modified, and a brief description of the functionality you implemented in each file. The document should also include instructions for testing your code and verifying the results.