Problem with EER specialization

Question

Hi folks :)

I made this case:

One "entity" can be a "corporation" or an "individual" but this same "entity" can be also a "customer" or a "supplier"

I don't know how to make an EER model, but i tried this:

img199.imageshack.us/img199/923/eerg.png

And the physical model:

img704.imageshack.us/img704/2861/modelb.png

So guys, I did the right thing ?

Thank you