Confusion with E/Z configuration Could someone please illustrate how to determine the E/Z configuration of this molecule?




What I understand so far is that if the two highest priority substituent on each side are on the same side, then it's Z and vice versa. 

Now, how can I handle such a structure? 
I've considered it and I thought it might be $\ce{CH-CH3}$ on one side (up), and $\ce{CH2CH2}$ on the other. However, I don't think it's right. 

Bottom line is that I don't understand how to fractionate the ring into two substituents.
The CH3 and C2H5 groups are both smaller than the rest of the cycle. So these two groups can be forgotten and this molecule is Z.