Sure. Phil, I can take that. So on the derivatives, so the impact we saw in the first quarter. We talked about the mark-to-market. It was a combination of a gain that we saw on the unsettled positions we had during the fourth quarter in a price environment that was declining. Again that was roughly $300 million, $400 million on the mark-to-market. And then, when you look at the first quarter, again, we had a derivative activity on the unsettled positions there with rising oil prices, we saw a negative or an unfavorable mark-to-market on those positions. And so, it's really, when you look at a relative comparison, that's where we see the $600 million impact on the earnings. Going forward, it's not an easy thing to predict. It obviously depends on what happens in the price environment. I can tell you that, again, generally what will happen is if oil prices rise, we are likely to see unfavorable impacts on those mark-to-market positions. And then, if prices decline, we are likely to see a gain. I think, if you looked at the quarterly, the absolute quarterly effects last year, it was a couple hundred million dollars per quarter. Again, sometimes it was negative, sometimes it was positive. But hopefully that gives you some indication of the level of activity. And as Jack mentioned, we are increasing the amount of asset-backed trading that we are doing. So that might increase the impact you see in a quarter. But again, we are not taking speculative positions. This is based on our assets. And so you are not likely to see a significant increase. But again, hopefully that gives you some perspective, Phil, on what to expect going forward. On your second question on the cash, so, in the first quarter we did see, I think, we mentioned, there is always going to be some timing on the equity companies, difference between when earnings occur and when we get those dividends. There is always going to be an impact on that. And in the first quarter, we do typically see a bit higher increase in that area. When it comes to the timing when that comes back, if you look at the biggest impact there is on Tengiz, our equity investment in Tengiz. And so, as you know, they're undertaking a significant expansion. And so a lot of those earnings are being reinvested back into that expansion. We are still getting some dividends from them. But a lot of that is going to be delayed until they have completed that expansion. And in the first quarter, that was roughly about $400 million, that timing difference between earnings and dividends. But for the rest of it, again, we see a little bit of a headwind in the first quarter. That's likely to work itself off during the year. The one specific item where it might be longer than that is the TCO investment in Tengiz.