 I'll let us continue with the demonstration of using ternary diagrams for crude classification. This time we will place the type 4 aromatic naphthenic crude on the ternary diagram. You'll see the boundaries for this type of crude. That is aromatics greater than 50%, naphthenes greater than 25%, paraffins less than 10% in type 4 crude oils. See the horizontal line right in the middle of the triangle which designates the first boundary that's aromatics greater than 50%. So above that line in the orange region in the triangle the aromatic content is greater than 50%. That is the first boundary. The second boundary line defines an area where naphthenes are greater than 25%. You see the line on the triangle to the right of that line everywhere is naphthenes greater than 25%. With these two boundary lines now aromatics greater than 50% and naphthenes greater than 25% we are confined to that little triangle the orange triangle in the ternary diagram. Now we need to place the third boundary line. The third boundary line for this type is paraffins less than 10%. You see the gray shaded region which is essentially type 4 aromatic naphthenic crude region as we have established. We can now identify the region for group 5 crude oils that is aromatic intermediate crude that is bound by two lines. So you can see the purple region purple triangle bounded by paraffins greater than 10% and aromatics greater than 50%. This is number 5 type aromatic intermediate crude. With these boundary lines we can now identify the region for type 6 aromatic asphaltic crude as you can see the orange region which is bound by naphthenes less than 25% and paraffins less than 10%.