How can I implement ensemble averaging in MatLab?

I am attending an Artificial Neural Networks course, and recently, the professor assigned us this problem (please, see the attachment). It has to do with committee machines and expert systems.

We can use the Matlab Toolbox to create the experts (neural networks), but I find very difficult to implement the code of the MatLab program. I will appreciate very much if anyone helps me with this exercise.

[Greg Heath]

Since there is more than one way to do this

 1. Write out the logic that you wish to implement.
 2. Convert it to code
 3. Apply it to one of the MATLAB datasets

help nndatasets

 4. If there is a problem, post code, comments and error messages.