All right. On your first question in respect to the shortage of gas and the increase in price, we actually see it as a normal response in the marketplace. When there's a shortage of supply, the price goes up. It's supply and demand.
On the concern about trying to introduce controls on price gouging, if it's indeed price gouging—and I don't know if it's price gouging, because it's a very difficult definition—we think it's interference in the marketplace and sends the wrong signals.
It doesn't mean it's easy for consumers. It's extremely difficult. It's why I said in my comments that we would welcome the role of NRCan, which is doing a very good job in this area right now, and also the industry to give consumers more information so that they can understand the cycling of gas prices in the market.
Again, we follow this market very closely, looking for anti-competitive acts. NRCan follows it even more closely than we do, and we see these cycles. Tuesday evening may be a little less expensive than a Friday. We often hear the question on why the price of gas goes up on a Friday. If you've read economics 101, it's kind of obvious. People tend to travel on the weekends. There's a greater demand for gas on the weekends. It's not surprising that gas prices go up on the weekend.
One can sense a cycle in these prices. We think it's helpful for consumers to be better armed so they can identify the cycles and make purchasing decisions in the marketplace that reflect the supply and demand.
In terms of the four elements, I will again turn the mike over to Richard, who is very conversant in this area.
I would also say that you would probably get more help and details from the NRCan folks who will be following us, but we certainly have quite a strong awareness of how those price parts move.
Richard.