Posted by Sandhya on .
Design some simple digital circuits based on Boolean expressions. Draw circuits that implement the following Boolean expressions using some combination of AND, OR, NOT, NAND, and NOR gates.
 NOT X OR NOT Y OR Z
 X OR Y OR NOT Z
 NOT X AND Y OR NOT Y AND Z
Write a two to three page paper discussing your design. Please include the following:
1. Diagrams of your logic circuits.
2. Truth tables that indicate the output (a 0 or a 1) for each possible combination of values of X, Y, and Z.

physics 
Dr Russ,
This is one of those where you need to post your suggestions and we will comment. From a personal point of view I like to convert the words into a Boolean symbols expression before I do anything else. You may have done the reverse to post it here, of course.
If it is useful there are truth tables for the various gates here:
http://en.wikipedia.org/wiki/Logic_gate
It is not clear in your question if you can use multiple input gates, such as 3input OR Gates?